Request.RawUrl whats is this ??

Hey , can any body telle my,What is the code linies below doing - explain in detals thaannx ? 

if (Request.RawUrl.IndexOf("?") != -1)

{
lnkJob.NavigateUrl = Request.RawUrl.Substring(0, (Request.RawUrl.IndexOf("?"))) + "?ebid=" + 2;
}


If aj had www.dr?du=2&godts=9

How can i get value for godts 

 
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