Displays a simple text box that allows users to enter a search expression and redirects to a page with the search results. The search indexes that should be used are specified by the web part displaying the results.
For details about the syntax that can be entered into search expressions, please refer to
Developer's Guide -> Modules -> Smart search -> Search syntax.
Help URL: http://devnet.kentico.com/docs/webparts/index.html?SearchBox_overview.htm