04 / Page elements
This page defines 14 On-Page SEO terms. Each entry gives a plain definition, a What to check step you can apply to your own site, and links to deeper SiteAuditLint guides where they exist.
Title tag
A title tag is the HTML element that defines a page's title, often shown as the clickable headline in search results. Google may rewrite titles it considers unhelpful.
Every indexable page has a unique, descriptive title that matches the page's main topic and is not truncated in key places.
How long should a title tag be?
There is no official character limit. Google truncates by pixel width, so keep the most important words near the start.
Go deeper: Titles, Duplicate title tags
Meta description
A meta description is an HTML element summarizing a page's content. It is not a ranking factor, but it can influence click-through rate when Google shows it as the snippet.
Key pages have unique descriptions that match search intent, and templates do not repeat the same description across many URLs.
Why does Google ignore my meta description?
Google often writes its own snippet from page content when it better matches the user's query.
Go deeper: Meta descriptions, Missing meta descriptions
Heading tags (H1 to H6)
Heading tags structure a page's content hierarchy, from the H1 main heading down through H2 to H6 subheadings.
Each page has one clear H1 describing its topic, and headings reflect the real structure rather than being used for styling.
Go deeper: Headings, Why articles need H2 to H6 headings
URL
A URL is the web address of a page. Clean, descriptive URLs help users and search engines understand what a page is about.
URLs are lowercase, readable, use hyphens between words, and stay stable over time.
Go deeper: URLs
Slug
A slug is the part of a URL that identifies a specific page, such as on-page-seo in /academy/seo-terms/on-page-seo.
Slugs are short and descriptive, and changed slugs are always 301 redirected from the old version.
Go deeper: SEO-friendly URLs
Alt text
Alt text is a text description of an image in the HTML alt attribute. It supports accessibility for screen readers and helps search engines understand images.
Meaningful images have accurate, descriptive alt text, and decorative images use an empty alt attribute.
Go deeper: Missing image alt issue
Image optimization
Image optimization is reducing image file size and improving image delivery and context so pages load fast and images can rank in image search.
Images use modern formats like WebP or AVIF, have explicit dimensions, and are lazy-loaded only below the fold.
Go deeper: Images, Image SEO audit
Structured data
Structured data is code in a standardized format, usually JSON-LD, that describes a page's content to search engines in a machine-readable way.
Markup matches visible page content, validates without errors, and is present in the rendered HTML.
Go deeper: Does schema markup improve AI visibility?
Schema markup
Schema markup is structured data using the Schema.org vocabulary, such as Article, Product, Organization, or BreadcrumbList.
Use only schema types and properties Google supports for the features you want, and monitor enhancement reports for new errors.
Does schema markup improve rankings?
Not directly. It can make pages eligible for rich results and help search engines understand entities, which can improve visibility and click-through rate.
Go deeper: Invalid schema issue
Internal link
An internal link is a hyperlink from one page to another page on the same website. Internal links help users navigate and help search engines discover pages and understand their importance.
Important pages receive links from relevant, well-linked pages, and no internal links point to redirects or errors.
Go deeper: Internal links, How to audit internal links
Anchor text
Anchor text is the clickable text of a link. It tells users and search engines what the linked page is about.
Internal anchors are descriptive and varied, and avoid generic text like "click here" for important links.
Go deeper: Generic anchor text issue
Breadcrumb
A breadcrumb is a navigation trail showing a page's position in the site hierarchy, such as Home > Academy > SEO Terms.
Breadcrumbs reflect the real site structure and use BreadcrumbList structured data where appropriate.
Landing page
A landing page is the page a visitor first arrives on, whether from search, ads, or another source. In SEO, it usually means the page targeting a specific query.
Each landing page matches one clear search intent, and no two pages compete for the same primary query.
Go deeper: On-page SEO checklist
User experience (UX)
User experience is how easy and satisfying a page is to use, including layout, readability, speed, and navigation.
The main content is visible without heavy interruption from pop-ups, ads, or interstitials, especially on mobile.
Browse the full SEO terms glossary, or run a technical SEO audit with SiteAuditLint to check these signals on your own site.