A Promotional Model: Some companies want their customer base to interact directly with models who are generally attractive with likable personalities to promote their brand. You may see these models in grocery stores, events, or clubs promoting things like food, liquor, or new products.
A Spokesmodel: Spokesmodels are hired to be consistently associated with a specific brand. Contrary to popular thought, spokesmodels don't always have to verbally promote the brand.
A Trade Show Model: This type of model is hired by companies or brands to advertise to attendees at a trade show tent or booth. These models are typically not employed by the company but hired as "freelance" models for the event.