HTML lets you specify metadata – additional information about a document in a variety of ways. The META elements can be used to include name/value pairs describing properties of the HTML document, such as author, expiry date, a list of keywords, document author etc.
The <meta> tag is used to provide such additional information. This tag is an empty element and so does not have a closing tag but it carries information within its attributes.
You can include one or more meta tags in your document based on what information you want to keep in your document but in general, meta tags do not impact physical appearance of the document so from appearance point of view, it does not matter if you include them or not.
Adding Meta Tags to Your Documents
You can add metadata to your web pages by placing <meta> tags inside the header of the document which is represented by <head> and </head> tags. A meta tag can have following attributes in addition to core attributes:
You can use <meta> tag to specifyimportant keywords related to the document and later these keywords are used by the search engines while indexing your webpage for searching purpose.
You can use <meta> tag to give a short description about the document. This again can be used by various search engines while indexing your webpage for searching purpose.
Cookies are data, stored in small text files on your computer and it is exchanged between web browser and web server to keep track of various information based on your web application need.
You can use <meta> tag to store cookies on client side and later this information can be used by the Web Server to track a site visitor.
Following is an example of redirecting current page to another page after 5 seconds. If you want to redirect page immediately then do not specify contentattribute.