•The website has no contact information. A legitimate business has a way for you to reach them. Look for an "About" page that offers information on the company or CEO, along with a phone number, address or contact email. (Try calling the number to see if anyone answers.) A website with only a contact form and no other way to get in touch with an actual human is suspicious.
A work from home job can be any position that does not require you to be in an office. There a wide range of work from home jobs. Some companies offer opportunities for employees in traditional roles to work remotely for all or some of their workweek. These jobs often use technology for meetings, assignments, and collaboration. This practice is called telecommuting. Other work from home opportunities may include jobs such as customer service representatives for which companies will hire remote workers, or part-time virtual assistants to manage work which does not require a physical presence in the office.