I watch The Zoo and The Secret Life of The Zoo and they use a whistle, which they actually hold in their mouth to mark the behavior. I'm sure we don't see all the exact training, but that looks more accurate to me. But dogs are actually quite easy, so easy in fact that like I said, they're more likely to train us than the other way around. They're just so fun and amazing.I do that plenty too!! But sometimes it’s nice to have the precision and mark a specific moment or behavior. In that case, good boy or full phrases like that might take too long. I don’t know the exact specifics of it because I’ve never really done “clicker training” per se but people that do it I think like or need the precision and marking an exact moment. So for example maybe you’re shaping a new trick or something they don’t know yet and that nose bump he just did was perfect but the pawing a second ago wasn’t and you need to mark the correct one. Stuff like that. Idk, it gets complicated hahah there’s lots of articles and research on the exact science I think but I haven’t really read them.
I usually do it completely “wrong” though and just say a ton of different stuff at once I’m always like “yes! Good boy! Good! Good job! Yes!”
For basic obedience and stuff I don’t think it really matters much or is needed but when you start getting into more advanced behaviors and shaping and stuff, the precision can be nice haha
But even then, I much prefer using my voice over an actual clicker.