What's the difference?
Did you see how her ex-husband joined in on the standing ovation for her.
Did you see how her ex-husband joined in a standing ovation for her.

What's the difference?
Thanks a lot.

Question

What's the difference?
Did you see how her ex-husband joined in on the standing ovation for her.
Did you see how her ex-husband joined in a standing ovation for her.

What's the difference?
Thanks a lot.

Answer

The first one seems to be a phrasal verb, as it contains a verb with a preposition (on).

Both technically have the same meaning, it's just that the first one is stated differently.