The folks at Google Analytics are always trying to improve, and they usually find a way to do it. This time they’ve come up with a nifty little tool called Annotations. It’s simple, really.
Annotations allows any user with access to a Google Analytics profile to leave shared or private notes right on the over-time graph.
Why? Why would you want to do that?
Well, let’s say Bob in marketing decided to build a new landing page. He did and after publishing the landing page there was a slight drop in traffic to a previous landing page that had been doing well. If he was able to Annotate the exact date he created the landing page and the time it was published then you could see if there might be a possible connection between the publication of your new landing page and the loss in traffic to your other page. If the new page was published at 11:59 a.m. on December 26, 2008 and your traffic for the previous landing page begin to drop at 11:03 a.m. on the same day then you can determine that the publication of the landing page was not the reason for your traffic drop.
Annotations gives you the ability to make notes on key events in your marketing execution. Anyone who can access your Google Analytics account can make an annotation and that helps the whole team. Not a bad idea.