HTML meta elements can be used to improve search-engine listings. The "keywords" meta element is either not used at all or is given very little weight by the major search engines.
If there is no "keywords" meta element in the head element of the page markup, the meta element is added to the page when the page is rendered. If the page markup already has a "keywords" meta element, this property gets or sets the content attribute of the meta element.
You can also set this property in the @ Page directive.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)