The transparent SEO glossary

Understand the terminology used by SEO specialists. We turn technical concepts into concrete, plain-English explanations.

A

6 terms

A/B Test

An A/B test compares two versions of a page, message, or call to action to learn which performs better. In SEO, tests should be designed carefully because major changes can affect user behavior and how search engines understand the page.

Algorithm

A search algorithm combines rules and signals to decide which pages appear first. When an agency mentions an algorithm update, it should explain the concrete implications for your website.

Alt Text

Alt text helps search engines and screen readers understand an image. Useful alt text describes the image naturally and does not stuff keywords.

Analytics

Analytics shows how people find and use a website through measures such as sessions, conversions, traffic sources, and engagement. These numbers should be interpreted alongside concrete website changes.

Anchor Text

Anchor text tells users and search engines what the destination is about. Descriptive wording is usually more useful than generic phrases such as “click here.”

Authority

Authority describes how established and trustworthy a website appears in its field. Content quality, mentions, links, brand recognition, and technical stability can all contribute.

B

4 terms

Backlink

A backlink points from an external website to yours. Relevant, trustworthy backlinks can support credibility, while manipulative or unrelated links can create risk.

Black Hat SEO

Black hat SEO attempts to manipulate search results through deceptive tactics. It may produce short-term gains but increases the risk of losing visibility and trust.

Bounce Rate

Bounce rate can suggest that visitors did not find what they needed, but context matters. Some pages satisfy a visitor immediately and can still have a high bounce rate.

Broken Link

Broken links send users and crawlers to missing or failing pages. Fixing them improves navigation and helps avoid wasting crawl resources.

C

11 terms

Cache

Caching stores copies of pages or assets so they load faster. It improves performance but can delay the visible arrival of recent changes.

Call to Action (CTA)

A CTA guides a visitor toward an action such as booking, buying, or contacting. It should support the page’s purpose without obscuring the primary content.

Canonical Tag

A canonical tag tells search engines which version of duplicate or very similar content should be treated as primary.

Click-Through Rate (CTR)

CTR compares clicks with impressions. Search position, title, meta description, and brand familiarity can all influence it.

CMS

A content management system lets teams create and maintain pages without editing every file directly. WordPress is a widely used example.

Content Audit

A content audit evaluates pages for accuracy, usefulness, duplication, performance, and alignment with business goals. It helps determine what to keep, update, combine, or remove.

Conversion

A conversion occurs when a visitor completes a goal such as submitting a form, purchasing, or booking. The relevant definition depends on the business and page.

Core Web Vitals

Core Web Vitals measure loading, responsiveness, and visual stability through LCP, INP, and CLS. They are technical signals and should be read together with broader user experience evidence.

Crawl Budget

Crawl budget describes how many URLs a search engine is willing and able to crawl within a period. Large or technically inefficient sites usually need to manage it most carefully.

Crawler

A crawler follows links and requests pages to collect information. Search engines use crawlers to discover content for their indexes.

CSS

Cascading Style Sheets define layout, color, typography, and responsive behavior. Heavy or blocking CSS can affect loading and page experience.

D

4 terms

Deindexing

A deindexed page no longer appears in search results. This may be intentional through directives or caused by technical, quality, or policy issues.

Domain

A domain is the main address used to reach a website, such as example.com. Its history, configuration, and reputation can affect trust and discoverability.

Domain Authority

Domain Authority is a proprietary metric used by some SEO tools. It is not a Google metric and should not be treated as direct proof of rankings or business impact.

Duplicate Content

Duplicate content can make it harder for search engines to select the preferred version. Canonicals, redirects, and clearer information architecture can help consolidate signals.

E

5 terms

E-E-A-T

E-E-A-T is a quality framework used in Google’s evaluator guidance. Clear authorship, reliable sourcing, first-hand experience, and transparent business information can support these qualities.

Ecommerce SEO

Ecommerce SEO covers product and category content, technical indexing, structured data, internal links, and navigation for online stores.

Engagement

Engagement can include reading, scrolling, clicking, returning, or completing an action. No single engagement metric proves content quality on its own.

Evergreen Content

Evergreen content addresses a lasting need rather than a short-lived event. It still requires periodic review to remain accurate and competitive.

External Link

External links send visitors to a different domain. Relevant links can support context and sourcing, while broken or untrusted destinations can harm the experience.

F

4 terms

FAQ Schema

FAQ schema describes questions and answers in machine-readable form. It must match visible page content and does not guarantee an enhanced search result.

Favicon

A favicon appears in browser tabs and may appear in search interfaces. A clear, correctly formatted icon supports recognition but is not a ranking guarantee.

Featured Snippet

A featured snippet presents an extracted answer above or among standard results. Clear structure can improve eligibility, but search engines decide when and what to show.

Fresh Content

Freshness matters most for queries where current information is expected. Updating a date without improving the content does not make a page genuinely fresh.

G

5 terms

Google Ads

Google Ads places paid listings and other advertisements across Google properties. Paid placement is separate from organic SEO performance.

Google Analytics

Google Analytics records configured traffic and interaction data. Consent, tracking setup, filters, and attribution choices affect what the reports can show.

Google Search Console

Search Console provides data about queries, clicks, impressions, indexing, and technical issues for verified properties. Its data has reporting delays and defined limitations.

Googlebot

Googlebot requests and renders pages so Google can evaluate them for indexing. Access rules, server responses, links, and rendering all affect what it can retrieve.

Gray Hat SEO

Gray hat SEO refers to methods that may not be explicitly forbidden but still depend on manipulation or excessive risk. The boundary can change as guidelines evolve.

H

8 terms

H1

An H1 communicates the page’s main topic to users and assistive technology. It should be descriptive and fit the surrounding heading hierarchy.

H2

H2 headings divide a page into major sections. They improve scanning and help communicate the relationship between topics.

H3

H3 headings organize subsections beneath an H2. Logical nesting helps readers and assistive technology understand the page structure.

Header

A website header often contains branding and primary navigation. In code, the term can also refer to HTTP headers that carry request and response information.

Home Page

A home page introduces the business and guides visitors to important sections. Its navigation and internal links often make it central to site structure.

Hreflang

Hreflang annotations help search engines serve the appropriate language or regional URL. Each relationship should be reciprocal and use valid language or region codes.

HTML

HTML defines headings, links, images, forms, and other page elements. Semantic HTML supports accessibility and helps machines interpret content.

HTTPS

HTTPS protects data in transit using TLS. Valid certificates and consistent redirects are essential for security and user trust.

I

3 terms

Indexing

A page can be indexed after it is discovered, crawled, and evaluated. Crawl access alone does not guarantee that a page will be indexed or ranked.

Information Architecture

Information architecture defines how pages, categories, labels, and navigation relate. A clear structure helps users find information and helps crawlers understand the site.

Internal Link

Internal links guide users, distribute navigation paths, and help search engines discover relationships between pages. Descriptive anchors make those relationships clearer.

J

2 terms

JavaScript

JavaScript can update content, handle interactions, and run application logic. Search visibility can suffer when important content depends on scripts that fail or render too late.

JSON-LD

JSON-LD is commonly used to add structured data without mixing it into visible HTML markup. The data must accurately describe content available on the page.

K

4 terms

Keyword

Keywords help describe what people search for, but pages should address the underlying need rather than repeat a phrase mechanically.

Keyword Cannibalization

Cannibalization can occur when several pages target substantially the same need without a clear hierarchy. Consolidation, differentiation, or improved internal linking may help.

Keyword Research

Keyword research examines queries, intent, competition, and relevance to identify useful content opportunities. Search volume alone does not establish business value.

Keyword Stuffing

Keyword stuffing makes content harder to read and attempts to manipulate relevance. Clear, natural language is more useful to both people and search systems.

L

5 terms

Landing Page

A landing page focuses on one audience, offer, or action. Its content, navigation, and CTA should align with the visitor’s intent.

Lazy Loading

Lazy loading can improve initial performance by delaying off-screen images or components. Important content and the primary image should not be delayed incorrectly.

Link Building

Sustainable link building focuses on useful resources, relationships, and genuine mentions. Buying or manufacturing links can violate search guidelines.

Local SEO

Local SEO includes location pages, business information, reviews, local relevance, and Google Business Profile. Consistent details help users and platforms identify the business.

Long-Tail Keyword

Long-tail queries often express a clearer need than broad terms. They can connect specialized content with visitors who know what they are looking for.

M

4 terms

Meta Description

A meta description can influence whether someone clicks, although search engines may replace it with text from the page. It should summarize the content accurately.

Meta Tag

Meta tags provide instructions or descriptive information to browsers and crawlers. Examples include robots directives and viewport settings.

Meta Title

The title element helps identify the page in browser tabs and search results. It should be specific, readable, and aligned with the page content.

Mobile-First

Mobile-first design prioritizes smaller screens and essential content. Google also primarily uses the mobile version of a page when indexing content.

N

2 terms

Nofollow

The nofollow value tells search engines that a link should not be treated as a standard endorsement. Search engines may still use the link as a discovery hint.

Noindex

A noindex directive asks compliant search engines to remove or exclude a page from results. The crawler must be able to access the directive to read it.

O

4 terms

Off-Page SEO

Off-page SEO includes external links, mentions, reputation, and other signals outside the site. These signals should be earned rather than manipulated.

On-Page SEO

On-page SEO covers relevance, headings, metadata, links, media, and content quality. It should make the page clearer for users as well as search systems.

Open Graph

Open Graph tags specify the title, description, image, and other information platforms may use when a page is shared.

Organic Traffic

Organic traffic comes from standard search listings rather than advertisements. Changes can reflect rankings, demand, seasonality, brand interest, and measurement choices.

P

1 term

PageSpeed

Page speed affects usability and can be evaluated through laboratory and real-user data. One score cannot fully describe the experience for every visitor.

R

5 terms

Redirect

Redirects move users and crawlers from one address to another. Permanent and temporary redirects communicate different intent and should avoid unnecessary chains.

Referring Domain

A referring domain may provide one or many backlinks. Relevance and trust matter more than simply increasing the number of domains.

Responsive Design

Responsive design uses flexible layouts and media rules so one page works across phones, tablets, and desktops.

Rich Snippet

Rich results may show details such as ratings, prices, or events when eligible structured data is present. Correct markup does not guarantee display.

Robots.txt

Robots.txt tells compliant crawlers which paths they may request. It is not a reliable way to keep sensitive information private or guarantee deindexing.

S

13 terms

Schema Markup

Schema markup helps machines understand items such as organizations, products, articles, and events. It should match visible, accurate content.

Search Intent

Search intent may be informational, navigational, commercial, transactional, or local. Useful pages match the underlying task rather than only the query wording.

Search Volume

Search volume is modeled by tools and varies by market and period. It should be considered alongside relevance, intent, competition, and potential value.

Semantic SEO

Semantic SEO builds clear topical relationships through comprehensive content, entities, structure, and internal links instead of relying on exact keyword repetition.

SEO

SEO improves a website’s ability to be discovered and understood in unpaid search. It combines content, technical quality, structure, accessibility, and authority.

SEO Audit

An SEO audit examines content, technical setup, indexing, structure, and evidence to identify issues and opportunities. Findings should be prioritized rather than presented as an unqualified checklist.

SERP

A SERP may contain organic results, advertisements, maps, images, snippets, and other features. Its composition changes by query, device, location, and time.

Server-Side Rendering

Server-side rendering sends prepared HTML in the initial response. It can support performance and crawler access when implemented with reliable hydration and caching.

Sitemap

A sitemap can describe site navigation for people or provide URLs to crawlers through XML. Inclusion does not guarantee indexing.

Slug

A slug identifies a page within its path, such as “pricing” in /products/pricing. Short, descriptive slugs are easier to understand and maintain.

SSL Certificate

An SSL/TLS certificate helps browsers verify the website and encrypt traffic. Certificates must be valid, current, and correctly configured.

Status Code

Status codes communicate outcomes such as success (200), redirect (301), missing content (404), or server failure (500). Correct codes help browsers and crawlers handle URLs appropriately.

Structured Data

Structured data uses defined formats and vocabularies to describe entities and relationships. It can support enhanced search eligibility but must remain accurate.

T

3 terms

Technical SEO

Technical SEO covers rendering, status codes, directives, canonicals, performance, sitemaps, and site architecture. It creates access and clarity but does not replace useful content.

Thin Content

Thin content may be overly brief, duplicated, automated, or created mainly to target queries. The issue is usefulness and originality, not a fixed word count.

Title Tag

The title tag is commonly used in browser tabs and search results. It should distinguish the page and accurately reflect its main content.

U

2 terms

URL Structure

A consistent URL structure helps people and systems understand page relationships. Stable, descriptive paths are usually easier to manage than complex parameter combinations.

UX

User experience includes clarity, accessibility, speed, navigation, trust, and task completion. SEO and UX often overlap because useful, usable pages better serve visitors.

W

3 terms

Web Crawler

Web crawlers discover URLs, request content, and collect signals for search, monitoring, archiving, or analysis. Website rules and server behavior affect their access.

Website Speed

Website speed includes server response, resource loading, rendering, and interaction readiness. Real-user conditions can differ from laboratory tests.

White Hat SEO

White hat SEO focuses on helpful content, sound technical implementation, accessibility, and legitimately earned recognition. It favors durable improvement over manipulation.

X

1 term

XML Sitemap

An XML sitemap helps crawlers discover canonical URLs and can include update or media metadata. It does not replace internal links or guarantee indexing.

Y

1 term

YMYL

Your Money or Your Life topics require especially strong accuracy, transparency, and trust because poor information can cause meaningful harm.