Grappling someone replaces one of your attacks (so if you have 3 attacks, you can do 3 grapples).<br/>Some monsters grapple you for free, with special attacks.<br/><br/>In both cases, escaping the grapple is an action.<br/><br/>In the first case it is an opposed check, while monsters special abilities have a set DC you have to beat.<br/><br/>However, the grappled condition doesn't prevent you from attacking. Even the restrained condition only gives you disadvantage.<br/>Most of the times it simply isn't worth it to try to escape from a grapple (except if you are about to get swallowed or something)<br/><br/>(Of course this is how normally things go, this is testing new rules, so.... :P )