The developments continue in the world of Google's website analytics tool, Google Analytics, as the new Annotations feature is rolled out. It lets different users add comments to reports, files and charts to make it easier to explain and comprehend technical analytical information.

In a blog post, the Google Analytics team give examples of the type of situation they aim to help people overcome with the development: "Was that dip in traffic because the servers went down? When did the new display ads campaign launch? Who's responsible for the checkout page redesign and when did it go live?"

They point out that they want to end "the wild goose chase" by making it more straightforward to account for everything that happens to a website and online marketing.

With Annotations, any user with access to a Google Analytics profile can leave shared or private notes on over-time graphs. The team state: "Annotations complements existing anomaly detection by capturing the tribal intelligence of your company, which tends to be the most expensive and easily lost resource of all."

Other recent changes to Google Analytics include Multiple Custom Variables, Custom Reports and a new analytics tracking code setup wizard.