title: What does Approve button do with changeset on bitbucket.org?
body: <p>When using Bitbucket for source control, there's an "Approve" button that appears at the upper right of the commit page:</p>
  
  <p><img src="https://i.stack.imgur.com/xvrkK.jpg" alt="Bitbucket Approve Button"></p>
  
  <p>It appears to generate an activity message in the repositories overview page:</p>
  
  <p><img src="https://i.stack.imgur.com/ccRwI.jpg" alt="enter image description here"></p>
  
  <p>Is that all it does? What is the intended purpose of that button? Is it just a social feature?</p>