If you are working on Sharepoint 2010 social networking feature and your are using "GetTags" method from "socialdataservice".
The problem with this method is that it retrives all the tags for specific user only.
If you want to show the how many users tagged perticular page with specific tag then this methos will not help you.
I have found a very good article which explain how we can retrieve the all the tags for a specific location/page from all users.
Click here to see the article.
Thanks Elio for this wonderful article.