Canonical Tag: rel=canonical Syntax and How Google Uses It
The rel=canonical link names the preferred URL for duplicate pages. Syntax, HTTP header form, how Google and Yandex use it, and its limits.
4 min read
HTML TAGS
HTML Tags
Meta Author and Generator Tags: Syntax and Search Use
Meta author and meta generator tags name a page author and the software that built it. Syntax, HTML rules, and why Google ignores both.
3 min read
Meta Charset: Declare UTF-8 Character Encoding in HTML
The meta charset tag declares the character encoding of an HTML page. Syntax, HTML standard rules, HTTP header precedence and what it does not do.
3 min read
Meta Description Tag: Syntax and How Google Uses It
The meta description tag gives a short page summary. Syntax, HTML rules, and how Google and Yandex use it for snippets or replace it with page text.
4 min read
Meta Keywords Tag: Syntax and How Search Engines Treat It
Syntax of the meta keywords tag, what the HTML standard says about it, and why Google Search does not use it for indexing or ranking.
3 min read
Robots Meta Tag: noindex, nosnippet and Other Rules
Robots meta tag and X-Robots-Tag syntax, the rules Google, Bing and Apple document, and how nosnippet affects Google AI Overviews.
5 min read
HTML Meta Tags Cheat Sheet: Syntax and What Each Tag Does
Compact table of HTML meta tags, Open Graph and X card tags: what each tag does, what Google supports or ignores, and links to full guides.
4 min read
Meta Viewport Tag: Syntax, Values and Zoom Settings
Viewport meta tag syntax, every content value, what Google says about it, and why you must not turn off zoom with user-scalable=no.
3 min read
og:image Meta Tag: Syntax, Sizes and How Sites Use It
og:image syntax and image properties, the size rules Facebook and LinkedIn document, and how Google uses og:image for preview images.
4 min read