What's the difference between a bulletin board and a bulletin board?

The difference between a bulletin board and a bulletin board is as follows:

1. Appearance: A bulletin board is usually a relatively large billboard standing on the ground, which is usually used for advertising, promotion or public welfare promotion. Billboards are generally smaller than bulletin boards, and they are all set up in a specific place, such as advertising pages set up on the street, banners in front of shops, posters on campus, etc.

2. Environment: Billboards usually display high-quality advertisements, and their environment is relatively quiet and professional, for example, on expressways with billboards or in commercial centers. Billboards are more involved in people's daily life, and their advertising strategies are more creative and touching, and they are more easily noticed and felt by people.

3. Usage scenario: Bulletin boards are generally used in areas that need long-term advertising and wide coverage, such as highways and busy urban areas. Billboards are more used to promote specific products or services, such as publicity in shopping malls, communities or schools.