I tend to be pretty privacy conscious, but this was new to me. Going into the dashboard let me delete some old history, and I did set up automatic deletion even though I have tracking disabled.
When I need information about digital privacy, my first stop is usually the Electronic Frontier Foundation (EFF). They have a lot of good basic information, as well as news on their ongoing efforts to deal with new and emerging privacy threats.
It’s worth noting that as good as auto-deleting your activity and location history is, the best protection is to disable location, search, and activity history altogether. (Which is possible and not that difficult — just go to the same portal that’s linked in the Tech Tip.)