Of course, the need can be anything that people find valuable. It could be a product or a service or just a way to stay connected or entertainment. Whatever it is, it has to be something people "need" from a value perspective, if you are planning to make a business out of it.
Of course, you don't have to run a business. Many people do things out of their own interests that are never turned into businesses, and certainly humanity has been doing that for millenia. You don't have to turn it into a business. The points above are relevant to running a successful business.