Two ways:
One, it kinda gamified it for me, just having a score, meant I could go for a high score on days when I had the time for lots of steps/exercise. They build some in too, like streaks and hitting goals.

Two, the HR monitor definitely helped me push harder in cardio workouts. Knowing when I hit my max, and when it started dipping made even short workouts feel more effective (even if they weren't, placebo FTW).