Dear Aiden
I am afraid google translation is not so good and could not understand exactly what you are asking. I understand that you are in the marketing field. You want to offer marketing services for companies but you want to know if a license is required?
@ caliente
I am 100% certain but I think you must have 10 posts before you can give thanks. At the lower left part of each post there are 3 links. 1 for thanking (press the Thanks) a little star for reputation and finally a triangle with an exclamation mark for reporting the post (bad).