What does vertical mean?
A segment within an industry that is made up from similar customers and businesses. Vertical focus in a niche that can be marketed to in a manner that is similar to another vertical; the entirety of a business can be part of a vertical market, or can be simply one department within the industry.
Verticals in the business market are used in contrast to horizontals in the marketplace where the focus is of the business is diverted to a large number of customers, regardless of the industry. In business verticals, the vertical market caters to the needs of a specific group of people within an industry.