Both, they have several pricing models. Also cost per like, and cost per conversion (download). Maybe more. https://www.webfx.com/social-media/how-much-does-

Both, they have several pricing models. Also cost per like, and cost per conversion (download). Maybe more. https://www.webfx.com/social-media/how-much-does-facebook-advertising-cost.html#:~:text=The%20cost%20of%20Facebook%20ads,around%20%247.19%20per%201000%20impressions https://www.webfx.com/social-media/how-much-does-facebook-ad....