Achievements?

Hi everyone! I’m so psyched because I’ve been with FB for several years but I just got a 3 month Plus Pass! I’ve been looking at all the features and am so excited!

So how exactly do the Achievements work? Does anyone have any tips about them or can explain a bit?

If not, it’s ok I’ll also look around at everything some more :).

Ps I’m starting the 2 week Strong Runner Challenge on Thursday and can’t wait!