Why it matters to a buyer
A meta description has no direct effect on rankings, but it is often the deciding factor in whether a searcher clicks a result that is already ranking, so a weak or missing one can quietly suppress click-through rate on pages that are otherwise performing well. A buyer should not expect it to be shown verbatim every time; Google frequently swaps in a different snippet pulled from the page itself when it judges that text better answers the specific query typed.
How it is measured or applied
A meta description is written as a clear, specific summary of the page's value, roughly under 155 to 160 characters before it risks being cut off, distinct from every other page's description on the site rather than a repeated template. It should read like genuinely useful ad copy rather than a stuffed list of keywords, since keyword stuffing does not improve the odds Google uses it. Performance is checked in Search Console's performance report by comparing click-through rate for a page's actual query impressions before and after a rewrite.
Sources
- Control your snippets in search results, Google Search Central
