The integration is so that you can add annotations to your system based on any external events. I plan on adding annotations whenever I send out an email or ship a major product update.
ActivePieces is a new Zapier style automation tool. I like it because it has an open source component that allows anyone to create integrations. If you would like to create a free account to test it out, here is a link that will give you an extra 500 tasks per month.