What happened to "You're welcome!" as a response to "Thank You"? It's not even included in the canned answers on an apple watch. Have we as a society abandoned it?
I find np a worse message when taken literally. If I even have to write an email, it's at least a little problem. yw allows for a problem you solved for somebody without suggesting that it doesn't come at the expense of other priorities. Both will be interpreted the same way by almost everyone, of course.
If so, here the answer:
It is usually used as a polite response when someone thanks you for doing something. It's a way to acknowledge their gratitude.
I still hear it a lot. Together with so many alternatives, like "no problem", " happy to help", "don't mention it", " glad to assist", "anytime", "it was nothing", "my pleasure", " sure thing"... and I'm sure there are more.
I think OP was asking what it means as in how it came to haventhe meaning you describe. "You are welcome" seems to be a completely arbitrary thing to say and out of context.
Other commenters here explained it's supposed to mean "you are welcome to my assistance" basically - which makes sense, but in the short form it makes little sense if you arenot familiar with the origins of the phrase (as I was until now)