Overview: The Keywords Tag is a series of keywords that represents the content of your site

Search engines that support META tags will often use the keywords found on your pages as a means to categorize your website based on the search engines indexing algorithms (proprietary algorithms which index your website in search engine databases). Ensure you choose keywords that are relevant to your site and avoid excessive repetition as many search engines will penalize your rankings for attempting to abuse their system. Similar to the Description META Tag, search engines give priority to the first few words in your description, so focus on your main keywords and then elaborate further by using synonyms or other related words.

The Keyword and Description 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

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