The only thing I experienced on my side was in Google Play Music, which in my browser on my PC showed me as having no songs in my library. That, I definitely noticed!
Particularly strange as my mobile devices showed my library was still intact and playable from them. That fact kept my panic to a minimum.
All seems to be back up and working fine now.
What, if anything did you experience in your digital life?
This poor guy definitely feeling the pain. Glitch Is Causing Thousands Of Emails To Be Sent To One Man’s Hotmail Account
It will be interesting to read the "after-action" reports on cause.
You can check the status of Google services here.