Is it mandatory for an online website to form a company/llp?

Hello there,

I'm curious whether a website has to necessarily be a legal entity i.e. form a LLP/Company out of it? Note that the website could be a general content delivery website and not into selling tangible products.

I understand that may really not be necessary technically on the first day however, what if it becomes a business over time and the site starts selling some sort of Premium online services and we'd like to protect the brand identity? Will a trademark be enough or does it really have to become a distinct identity by forming a Company/LLP?

Thanks.