I haven't worn an Apple Watch since the 5th generation. Now, on the 11th, quite a few things have changed. Along with better smart features, workout insights, new sleep metrics, and an all-around improved experience, the Health app has come on leaps and bounds.
If you're an Apple user, this is the app that's installed on your phone when you buy it. With your permission, it'll automatically record your step count and daily activity levels. When you pair it with a fitness tracker (an Apple Watch 11 is naturally the most compatible), you'll get even more data.