About the number of characters

If I create my own character, I think I have a feature that allows me to go to other games, is there a limit to creating these characters? If there is a limit, how many will be restricted. This feature is so convenient that I want to use it as much as possible. 

There is no limit to the number of characters you can create.  However, there may be a limit on a per-game basis of how many characters the game can have transferred to it (not created inside the game).  Games created by a user with a Free account can only have 3 characters (per game, not per user) transferred from the Roll20 Characters or Character Vault.  Games created by a user with a Plus or Pro account, or users (players) with a Plus or Pro account in a free game do not have that restriction.