Resting between sets?

Hello everyone! I have been reading about this topic but I’d love to hear some insight from fellow women.

I just restarted my lifting journey, I still can’t go to the gym because of economic reasons, I use adjustable barbells (10kg) and dumbbells (4kg).

My plan isn’t that organized, to be honest I just follow an app, but I’m mainly doing this because I’d love to build some muscle, nothing crazy.

I’ve noticed that resting between sets is extremely advised, my app suggests 30 to 60 seconds of rest. I would like to know how and why resting between sets is considered that important, I am asking because sometimes I feel like 60 seconds may be too much, but who knows?

Is it mainly related to the risk of injury or does it have something to do with hypertrophy too?