Google released a new Website Optimizer feature “experiment notes,” which helps you include documentation as part of your testing. You can now add annotations depends on what stage your experiment is in. For e.g. if you're designing; you might include testing hypothesis or some variations. And as your experiment concludes you might include thoughts on why variations performed as they did. “Experiment notes’re also great if you’ve several teams coordinating on a Website Optimizer experiment. You'll find experiment notes on the Settings page for any experiment.”