Meta tags provide metadata about HTML pages or web-pages. In other words, it gives some information about our HTML page, the metadata does not appear on the webpage, but it will be displayed when you search for any keyword on the search engine.
Why Use Meta Tags
It is used to specify page description, keyword, page author, previous modified by search engine, index page or to specify.
Note: <Meta> tags always remain inside the <head> tag
Note: Metadata always passed as name / value pairs.
Define keywords for search engines
<meta name="keywords" content="SEO is important for every websites"> Define a description of your web page
<meta name="description" content="Free Web tutorials on HTML and CSS">Define the author of a page
<meta name="author" content="Hege Refsnes">Refresh document every 30 seconds
<meta http-equiv="refresh" content="30">Meta tag for stop Search engine crawlers to indexing a page
Stop Search engine crawlers
<meta name="robots" content="noindex">