BCMonster is a pool for Mine special cryptocurrencies and you will not be able to mine currencies such as bitcoin and Ethereum in this pool. In fact, this pool provides Mine with CPU and GPU systems, and bitcoin cannot be mined with these systems.
The registration process at BCMonster is easy, and if you want to Mine currencies like Komodo and ZCash, bcmonster can be a good option.
The pool's home page transmits little information to the user, which would be more detailed. Of course, you can probably find the answers to your questions in the help section.