I usually try to relate it to something else similar in real life. For example, If I'm designing the front-end for an app, I explain that I'm the person who designed a cupcake store and operates it day-to-day, rather than the kitchen in the back of the same store. The cupcake store being the 'app'. Sorry if that sounds ridiculous haha.

Woa, this helps a lot! Thank you. Is this how it works in desktop apps like Slack and Discord? I noticed that they do that too.