Push notifications are the alerts that apps send to your phone or computer even when the apps aren't open.

What do successful marketing strategies and breakfast have in common? Answer: The best ones involve variety. Think about it. A healthy breakfast means eating a variety of foods — fruit, toast, eggs.

I often think that it would be convenient to send push notifications to myself, such as when creating a little tool for myself, but push notifications are difficult for both the sender and the ...