It should accurately describe the web page topic in a direct, compelling, or enticing way and feature the page’s keyword(s) (see item #1).
The meta description should be no longer than 160 characters to avoid getting cut off in search results. It should be even shorter than that (120 characters) if the majority of your website visitors are using mobile devices to view your website. It should accurately describe the web page topic in a direct, compelling, or enticing way and feature the page’s keyword(s) (see item #1).