Caught on and Pick up

Pick up and caught on are semantically related. in appreciate topic. In some cases you can use "Pick up" instead a verb "Caught on", when it comes to topics like understand, make sure, become aware of, become aware of information.

Pick up verb - To acquire complete knowledge, understanding, or skill in.

Caught on and pick up are semantically related. Sometimes you can replace term "Caught on" with "Pick up", this phrasal verbs are similar.