Meta description
The short summary tag search engines often show under your title in results — it doesn't rank, but it wins or loses the click.
The meta description is a short summary of a page that search engines frequently display beneath the title in results. It is not a ranking factor, but it is your ad copy in the search listing: a clear, specific description earns the click; a missing or generic one gets rewritten by Google or ignored.
<meta name="description" content="One clear, specific sentence about the page." />