What information is tracked under the *Reviews* tab in the *Activity* section of a user's profile?

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![edited screenshot of section referred to][1]

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I assume this section is related in some way to actions which are performed on [**posts listed for review**][2]. But I thought that I had reviewed some posts which were in this list, yet nothing has changed under [***Reviews* in my profile**][3].


  [1]: https://i.sstatic.net/AAiZ7.png
  [2]: http://askubuntu.com/review/
  [3]: http://askubuntu.com/users/52923/irrational-john?tab=activity&sort=reviews