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The Meta tag is an auxiliary tag for the HTML language head area, which is located between the head tag and the title tag in the head of the HTML document, which provides information that is not visible to the user. It can be used for browsers (how to display content or reload pages), search engines (keywords), or other web services.
I am now front-end page development often used meta tag content compiled into the mobile side of the web development meta information for the needs of access.