Glossary
Plain-English definitions for the terms behind these tools.
Canonical URL
The link tag that tells search engines which URL is the real one, so duplicate or parameterized pages don't split ranking.
JSON-LD
The recommended format for structured data — a script of Schema.org JSON that describes what a page is, kept separate from the visible markup.
Meta description
The short summary tag search engines often show under your title in results — it doesn't rank, but it wins or loses the click.
Schema markup
Structured data written with the Schema.org vocabulary — the shared type system (Article, Product, FAQPage) search engines understand.
Structured data
Machine-readable markup that describes what a page is — a product, article, FAQ — unlocking rich results and helping AI understand it.
Title tag
The page's HTML title — the single strongest on-page SEO signal and the headline shown in search results and browser tabs.