A conventional use of mention in the sense of bringing something up: the reply says the favour is too small to require further thanks.
A conventional use of mention in the sense of bringing something up: the reply says the favour is too small to require further thanks.
What does don't mention it mean after thank you?
It means the help was no trouble and the other person does not need to offer more thanks.
Is don't mention it polite?
Yes. In a friendly tone it is a modest, reassuring response to gratitude.
Is don't mention it the same as you are welcome?
They serve the same purpose, though don’t mention it places more emphasis on making the favour seem small.
Can don't mention it have a literal meaning?
Yes. Outside this fixed courtesy formula, the same words can literally ask someone not to discuss a subject.
What is another reply like don't mention it?
No problem, not at all, and my pleasure are common alternatives.