What Is Metadata SEO
Metadata SEO uses HTML tags in the <head> section to help search engines understand a page's topic and present it in search results.
If you have ever written a meta description that Google rewrote, you already know the tag is not a guarantee of what appears in the SERP.
Key points
- Write a unique title tag for every page to avoid confusing search engines and diluting relevance signals.
- Keep meta descriptions under 160 characters to avoid truncation in search results.
- Match metadata to the visible page content to avoid misleading searchers.
- Do not rely on meta keywords; Google ignores them for ranking.
- Use the canonical tag to prevent duplicate content issues and consolidate ranking signals.
A title tag that got rewritten
A travel blog wrote a title tag 'Best Beaches in Thailand – 2025 Guide'. Google rewrote it to 'Thailand Beaches – Travel Tips' in search results because the original was too long. The click-through rate dropped by 12% until the author shortened the title to 55 characters and included the brand name. The rewrite stopped, and the original title appeared in most SERP snippets.
Three metadata elements that matter most
- Title tag The most important metadata element. It appears as the clickable headline in search results and browser tabs. Keep it under 60 characters.
- Meta description A short summary shown below the title in SERPs. Google may rewrite it, but writing a clear description improves click-through rate.
- Canonical tag Tells search engines which URL is the preferred version when duplicate content exists. Prevents ranking dilution by consolidating link signals to the canonical URL.
Three common metadata mistakes
- Generic titles Using the same title across many pages confuses search engines and reduces relevance signals. Each page needs a unique title.
- Keyword stuffing Filling metadata with keywords instead of describing the page hurts readability and can trigger spam filters. Write for humans first.
- Ignoring robots directives A missing or misconfigured robots meta tag can block indexing of important pages. Check the 'noindex' directive carefully.
Common questions
What are meta tags?
Meta tags are HTML tags in the <head> section that provide information about a page to search engines and browsers.
What are meta keywords?
Meta keywords are a type of meta tag that lists keywords for a page. Google stopped using them for ranking years ago.
What is meta tags in SEO?
Meta tags in SEO are HTML tags used to control how search engines interpret and display a page in results.
Sources
- Google Search Central - Meta tags and attributes Official Google documentation on meta tags and their use.
- Yoast - Metadata and SEO part 1: the head section Explains the role of the <head> section and key metadata elements.
- Yoast - How to create a good meta description Guidelines for writing effective meta descriptions.
- Google Search Central - Title links in search results How Google generates title links and when it rewrites them.