Brian Fesler commented
I don't need a popup notification saying I just deleted a contact or whatever I just did. They stack up on the bottom left of my browser and eventually cover information on the screen I'm looking at. Then I have to delete them. I'd like these to be removed, or I should be able to opt out of them.
This is in "Contact Management & Segmentation" category, but I have seen these popups in various places and would like to globally get rid of them.