How exactly does facebook marketplace work?

I am just wondering how facebook marketplace really works. Does the renew system actually do anything for you? Are your posts shown randomly at the top / bottom / middle of the page based on when someone looks or when the page is refreshed? I am just wondering if it is even worth it to repost your listings or renew them or if facebook marketplace basically does that for you? Thank you for any info.

I’m new to Facebook marketplace but it looks like a real untapped area to make cash, how are you monetizing at the moment

is this like craigslist on FB?

Its exactly that

I have pretty good luck with marketplace. I do local ads though so it helps me target local people.