The first meta tag appearing in above code is telling what type of content is contained in the web page. It is also setting the encoding type, which is utf-8 in this case. It is very important to keep encoding utf-8, otherwise, special characters may enter in database or there can be type incompatibility in web page and database’s data types.
The second meta tag is “keywords” which is maintaining a list of keywords representing the content presented on the page. These keywords are indexed by web crawlers of search engines
The third meta tag is “description” that contains a brief description of the website. This description appears as small text in search results about the website.
The fourth meta tag “robots” is used with property “nofollow” if we don’t want our page to be indexed by search engines OR The fifth meta tag “robots” is used with property “index, follow” if we want our page to be indexed by search engines
The meta tag “author” stores information about author of the page
The meta tag “pragma” is set with property “no-cache” which will prevent browser from caching the page
The meta tag “expires” with the set time will inform the browser when to expire the page from the cache
and finally the last meta tag “refresh” will refresh the page after every 5 seconds. This can be useful if we want our page refresh again and again, for instance as happens in cricket score displaying websites to show the updated score after a few seconds interval.