Mobile businesses are named as such because they do not operate out of a specific location. However, the term 'mobile business' is broad, touching on anything from hot dog stands, electricians, trucking to many other ventures that operate on the go. Most mobile businesses start as small ventures and thus are ideal for people who do not have significant capital and desire to be their own bosses.
Nevertheless, starting a mobile business can prove challenging compared to a regular venture. Therefore, it is best to review your business ideas and determine how best to start before you delve right into the business and get it going.
Most mobile businesses fall under three categories:

Source: https://www.entrepreneurshipsecret.com/mobile-business/