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Architecture of a metasearch engine. A metasearch engine (or aggregator) is a search tool that uses another search engine's data to produce their own results from the Internet. Metasearch engines take input from a user and simultaneously send out queries to third party search engines for results. Sufficient data is gathered, formatted by their ranks and presented to the users.
Part of the Search engine optimization (SEO) glossary: A meta description tag is a snippet of HTML code in a web page header that summarizes the content that is on the web page. The meta description is usually placed after the title tag and before the meta keywords tag.When optimizing a web page for search engines (SEO), it is considered a best practice to use meta description tags.Before Google and other search engines changed how much importance they place on meta description tags, the keywords in a meta description could influence ranking on a search engine results page (SERP).hen optimizing a web page for search engines (SEO), it is considered a best practice to use meta description tags. Before Google and other search engines changed how much importance they place on meta description tags, the keywords in a meta description could influence ranking on a search engine results page (SERP).