I've been using it as a language learning app. I just join some channels in my target language and listen to various people's voices and accents and try to understand them. Every once in a while if I'm feeling brave I'll raise my hand and utter a couple of sentences. The topics are simple and often very repetitive, which makes it well suited for practicing languages.

The "regular" channels didn't feel very valuable to me after a week of use or so, and a lot of them seemed exclusively made for the purpose of gaining more followers (either on CH, IG or Twitter, etc.).