Overview: The Description Tag is a general description of what is contained in your webpage

Search engines that support META tags will often display the Description META tag along with your title in their results. Search engines will often capture the entire META tag of your description field, but webmasters should bear in mind that when a search engine displays the results to a user, the space is limited, usually under 20 words which you can use to grab the attention of a user. For this reason, when creating your META tags, webmasters should make the first sentence of their description field to capture the attention of a user and use the rest of the description tag to elaborate further.

The Description and Keyword Meta Tags are the two principle META tags that search engines look for when indexing your website. The description and keywords that you provide are likely the words that will show up in results, so make sure that you put the most energy and thought into the text you use to describe your website.

Recommended Usage: Strongly Recommended

Keywords META Tag (Guide)
META Tag Generator (Tool)
META Tag Scanner (Tool)