A meta description is a short summary of your webpage
A meta description is a 160 character summary of the content on your webpage. Search engines like Google display this description below the title of the page.
Though they no longer contribute to search engine rankings, they are still important to motivate users to click on the page. Social networks like Twitter or Instagram will also display the text when the link from the page is shared.
For a guide on how to write a good meta description, check out "What Are Meta Descriptions and How to Write Them."