To become popular or fashionable; to start being liked or used by many people.
Examples
Electric scooters really caught on in the city last year.
A: Do you think this new app will catch on?
B: Definitely. Everyone loves how easy it is to use.
Common mistake
Not: The idea didn't catch up.
Say: The idea didn't catch on.
'Catch on' = become popular; 'catch up' = reach the same level — different meaning.
More on “catch on”Another example · Tell it apart · Goes with · Tip
Another example
In my opinion, online shopping caught on quickly because it saves people a lot of time.
Tell it apart
The fashion caught on quickly.
The fashion died out quickly.
Goes with
- catch on (with)