Here’s WIRED,It’s worth emphasizing first that we’re really dealing with two topics: The amount of data Google collects on you, which is a lot, and what Google then does with it. To delete everything, select the Delete activity by link on the left. Hit Another option is to have Google automatically delete everything older than three months by clicking Choose to delete automatically at the top of the activity list. Here you wipe the entire history by hitting To manage your audio devices go to Voice and Audio Activity. Click Manage activity to get a list of everything you’ve said, and even the option to play back the audio recording.