Microsfot teams app - While working in office most of my colleges would come to my desk for trivial things if they wanted something but don't know what they want. During discussion they would figure it out what they wanted exactly. Since the corono outbreak everyone is WFH and now if they want something they figure out what exactly they want and then message me. This is a huge time saver. Now i can focus a lot at the problem and respond to the messages async.