HTTP Header X-Robots-Tag googlebot max-snippet: [number]

Use a maximum of [number] characters as a textual snippet for this search result. (Note that a URL may appear as multiple search results within a search results page.) This does not affect image or video previews. This applies to all forms of search results (such as Google web search, Google Images, Discover, Assistant). However, this limit does not apply in cases where a publisher has separately granted permission for use of content. For instance, if the publisher supplies content in the form of in-page structured data or has a license agreement with Google, this setting does not interrupt those more specific permitted uses. This rule is ignored if no parseable [number] is specified.