While you are working you often need to know which files you have changed, added, removed or renamed, or even which files got changed and committed by others. That's where the Synchronize action from Working Copy view comes in handy. The Working Copy View will show you every file that has changed in any way in your working copy, as well as any unversioned files you may have. If you use Synchronize view then you can also look for changes in the repository. That way you can check before an update if there's a possible conflict.
If you want more detailed information about a given resource you can use Information action from the Working copy viewcontextual menu or the Synchronize viewcontextual menu. A dialog will pop up showing remote and local information regarding the resource, such as:
A less detailed list of information is also presented when you hover with the mouse pointer over a resource and the tooltip window is displayed.