A digital note or gentle alarm that pops up on your phone or computer to help you remember to do something at the right time. It is just like putting a sticky note on the refrigerator or marking a big circle on your wall calendar so you don’t forget to take your medicine, go for a walk, or keep an appointment.

A recommender system is an AI tool that suggests things you might like, such as products, movies, or content, based on your interests.