Meta Tags and Search Engine Optimization
Certain meta tags can help with search engine optimization (SEO), the process of improving search results (quality and quantity) for web pages by search engines.
A <title> tag is certainly important for search results, although it's not technically a <meta> tag
Example The "description" meta tag is currently used by all major search engines. It might not be used for search rankings by all search engines (e.g., Google does not use it for rankings), but it is still beneficial because it displays in search results and can be useful in driving users to a particular page. Therefore, it's a good idea to add this meta tag with concise, clear text for each topic that you want to be found by web crawlers
On the other hand, the "keywords" meta tag has fallen out of favor and is not really used by search engines anymore.
Note Flare displays the content from the description meta tag in a search results abstract. However, this is supported only when using the MadCap Search engine. It is not currently supported with Elasticsearch.