What are Coinpoker freerolls?

Excuse me, as a novice in the realm of cryptocurrency gaming, I was wondering if you could clarify the concept of "Coinpoker freerolls" for me? I've heard the term mentioned in relation to poker tournaments, but I'm not entirely sure how they function. Specifically, how are these freerolls funded, do they offer any real prizes, and are they accessible to players of all skill levels? Additionally, are there any specific requirements or limitations that players need to be aware of before participating in such events? Your insights would be greatly appreciated.