Manage your online reputation;Google Profile has many services; google +1, plusone, google buzz, picasa web, twitter, facebook

Your profile is the way you present yourself on Google products and across the web. 

With your profile, you can manage the information -such as your bio (contact, details...), and links to other sites about you or created by you- that people see.

You can also enable people to contact you without displaying your contact information.

The history of your google "+1":

 (the services of +1 see: http://www.google.com/+1/button/)

 The history of Your Google Buzz:
(the services of google buzz, see: http://www.google.com/buzz)

The about item of the menu gives this window, divided in 2 parts:

left: your "about" info

right: the link (you blogger blog(s), twitter, facebook); all links are directly added when you use your google account (gmail i.e. ).

An exemple with twitter,
         select google:

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