Canonical Link Element at page level
Clean up Duplicate urls:
ExampleURL: http://www.example.com/page.html?sid=asdf314159265
Friendly URL: http://www.example.com/page.html
Specify in the head part:
<head>
<link rel=”canonical” value=”http://example.com/page.html”/>
</head>
This works similar to permanent/301 redirect in action.