Font Awesome include question

Hello there,
i’m new one, just registred an author account.
I’d like to know if i need a license to include font awesome on a product.
Assume i’d like to create share buttons, where i want to show up some social icons from FontAwesome or something else, i need to buy a license from them or something like that?
Thank you in advice for replays!

(not an official reply, if in doubt contact support) Font Awesome is under GPL incl. for commercial projects so you shouldn’t need anyhting specific but here’s no harm in including their general licensing docs in your theme files.

Maybe i should start to read some licenses, thank you for your replay!