Google adds User Profiles to their applications in a constant move towards making their application more social.
In their push to make all of their applications more social (perhaps in fear of Facebook) Google has added user profiles to their applications. Now you can upload a photo of yourself and describe your interests. I’m not sure where they plan to go with this information, but it’s worth configuring if you have a Google Account.
Here is a screenshot of my user profile.
If you have a Google Account I recommend filling it out this information. There is no harm (that I can see) of doing so. You never know how this information may pop up in the future to your benefit!