This test checks whether metadata (a type of hidden information on a webpage) is present, and being used correctly. In particular, this includes meta tags.
Some metadata has great value, particularly to search engines. Correct use of metadata can improve your placement in search engines, but more importantly how your website appears when in a search engine.
In particular, the description meta tag, is frequently shown in Google beneath the link to a specific result.
We look for all meta tags, but we only penalise a sites score if a description meta tag isn't included
Ensure that as a minimum you include a description meta tag in the head of each page on your site.