OK, from Excel with your new webbrowser control sat on your sheet in fron of you, open up the Visual Basic Editor (shortcut Alt+F11) qand open up the Immediate Window if it isn't already open (Ctrl+G).
Type into the Immediate Window the following:
activesheet.WebBrowser1.Navigate "Http://www.google.com"
This should take you to Google (naturally). You will need to investigate what options are available to you thru the Web Browser properties and methods (use the Object Browser within the VBE to do this). You can have simple navigation (eg Back/Forward) by right-clicking in the webbrowser control.