A "meta description" is a short summary that explains what a webpage is about. It is usually displayed in search engine results below the page title. Full definition
Read the title tags and meta descriptions of higher ranked pages for inspiration and examples. (oberlo.com)
Keywords in meta descriptions do not cause ranks to go up but the improved click through rate by users seeing a keyword and a solid reason to click, can help your SEO. (legalmarketingreview.com)
This means that we will be implementing SEO optimization components, such as meta descriptions, title tags and performing keyword research. (commercialcapitaltraining.com)