Moralis server vs Moralis Web3 API

Hi! I am new on Moralis. Can you explain what is the different of using Moralis Server instead of Moralis API? What additional futures does it provide? I think that events watcher for blockchain, but what else?

if you use Moralis Server then you can sync events in db, also you have authentication for users included, you can also use cloud functions

if you use only the API you will need your own server

Thank you! Thank you!