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Glossary

Web, SEO & design terms defined clearly

A working glossary of web development, SEO, design and digital-marketing terms — maintained by the Web Accuracy team and updated as the industry moves.

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Alt Text

Descriptive text attached to an image via the HTML alt attribute. Screen readers announce it to visually-impaired users,

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Backlink

A hyperlink from another website pointing to yours. High-quality backlinks from authoritative, topically relevant domain

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Breadcrumb

A navigational row of links (Home / Category / Subcategory / Page) that shows where the current page sits inside the sit

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Canonical URL

The definitive URL for a page when multiple URLs could show similar content. Declared via a <link rel="canonical"> tag,

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Core Web Vitals

Googles set of user-experience metrics: Largest Contentful Paint (LCP), Interaction to Next Paint (INP) and Cumulative L

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Crawl Budget

The number of URLs Googlebot is willing to fetch from your site in a given time period. Large sites with wasteful URLs (

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Cumulative Layout Shift (CLS)

A Core Web Vitals metric measuring unexpected visual movement of page elements. Reserving image dimensions, avoiding lat

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Domain Authority (DA)

A Moz-created score (not used by Google directly) that predicts how likely a domain is to rank. Related metrics include

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E-E-A-T

Experience, Expertise, Authoritativeness and Trustworthiness — the framework Googles Quality Raters use to assess conten

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Featured Snippet

A short answer pulled from a ranking page and displayed at the top of Google results. FAQPage and HowTo schema, combined

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Hreflang

HTML or sitemap attribute that tells search engines which language and region a page targets. Critical for multi-country

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Internal Linking

Hyperlinks between pages on the same website. Strategic internal linking distributes ranking authority and helps both us

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Largest Contentful Paint (LCP)

A Core Web Vitals metric measuring how quickly the largest visible element on the page renders. A good LCP is under 2.5

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Meta Description

A short summary of a page set via a <meta name="description"> tag. Not a direct ranking factor, but strongly influences

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Open Graph

A set of HTML meta tags (og:title, og:description, og:image, etc.) that control how a URL appears when shared on Faceboo

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PageSpeed Insights

A free Google tool that analyses page performance in both lab (Lighthouse) and field (CrUX) conditions, reporting Core W

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robots.txt

A text file at the root of a site instructing crawlers which paths they may or may not request. Crucially it does NOT st

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Schema Markup

Structured data, usually serialised as JSON-LD, that describes page content to search engines using the schema.org vocab

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SEO (Search Engine Optimisation)

The practice of improving a websites quality, relevance and authority so it ranks higher for commercial and informationa

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SERP (Search Engine Results Page)

The page Google or another search engine returns for a query. Modern SERPs include organic results, ads, featured snippe

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Sitelinks Searchbox

A search field that appears directly inside a sites Google listing. Enabled by adding a WebSite schema with a potentialA

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XML Sitemap

A machine-readable file listing a sites URLs with optional priority, changeFrequency and lastModified hints. Helps searc

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Speakable Schema

A schema.org specification identifying which parts of a page are best suited for voice assistants (Google Assistant, Ale

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Structured Data

Information on a page encoded so machines can unambiguously parse it — typically via schema.org JSON-LD. Foundation of r

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Technical SEO

The subset of SEO focused on crawlability, indexability, site speed, mobile-friendliness, structured data, internal link

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