Glossary — Implementation
Meta Description/ めただぃすくりぷしょん
A meta description is a meta tag in the HTML <head> that contains a 120–160 character summary of a web page's content. It is used both in Google search-result snippets and to help AIs understand the page.
You write it inside <head> like this:
<meta name="description" content="An introductory guide that unpacks the definition of GEO (Generative Engine Optimization), how it differs from SEO, and the current state of the Japanese market using observed data from Smoke analysis.">
Once set:
| Condition | Description |
|---|---|
| 120–160 chars | Google's display limit. Anything longer is truncated |
| Includes the keyword | Contains keywords that match the search query |
| Encourages action (ideally) | E.g., "you'll learn ~" / "we explain ~" |
| Unique per page | Don't reuse the same text |
| Accurately reflects the page | "Clickbait" backfires |
See also OG tag for more detail.