what are the Benefits of Meta Tag?

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* It's believed to still be used by some lesser-known search engines. Having a meta description tag on each page may give those pages an SEO advantage with those search engines.
* It appears in search results with some search engines, especially if it contains the keyword searched for. (Search engines sometimes display part of the meta description tag content along with a page snippet, or just a snippet, depending on the search engine and what is searched for.) Well-written description tags that appear with search results may be better at attracting searchers to the page than snippets of text from the page.