It depends on your traffic characteristics (nationality, age, gender, interests). One of the obvious methods to monetize would be to make a website with content relevant to your traffic and monetize with cpa offers, clickbank products, other affiliate products, ppv, etc. Or simply make an Adsense website and send your traffic there.
I've already made a site but adsense banned me for no reason just when I reached 10€
The fans are:
59% Female
55% 18-24 y
Whatsapp niche