On-site teaching, explanation teaching, tourism and documentary. Host refers to an individual who has various business abilities such as collecting, editing, broadcasting and controlling, and is an editor, reporter and announcer in a relatively fixed program. Hosts of food festivals can be divided into four types: on-site teaching, explanation teaching, tourism and documentary. In radio or television, a person who appears to host a fixed program for an audience is called a program host. A fixed program hosted by a fixed real person for the audience or audience is called a host program.