Every theme has 1 license included, except if there is any other offer present.
1 License it's to be used in 1 domain name and any related sub-domains.
Example, you bought a theme and you used your license key for the domain www.example.com.
That license can be used on a sub-domain like anything.example.com but can not be used at a different domain like anyotherdomain.com.
If you need more licenses, please check our licenses packs.