There are like 3 to 5 multi-episode arcs that aren’t really necessary, but having watched almost all of clone wars, it’s very good - especially at the end - and recontextualizes or adds context to a lot of the stuff in episode 3 that seems odd or is unexplained. Anakin is a better character for it. The same goes for Rebels once you get past the first 1-2 seasons. In general, it’s worth your time. Go find an essential watch list online.