Marss was made to give back freedom back to the users, we will not limit the content users upload unless the content(s) are extremely graphic, sexual and or hate speech. Keep in-mind we will not remove content unless it is breaching copyright, or targeting someone or something, for example "Doxing" and or leaking someones personal infomation.

Only upload content that you have the legal rights to upload! You can read about copyright here: CLICK ME.
You're free to include whatever you want in your content, but, enable the explicit checkbox if you have anything explicit in it, such as but not limited to; swearing, gore, or sexual content.

Follow laws in your country please.
You are the one responsible for your uploads.