Concept:Trade fairs and exhibitions are promotional activities, not research or service tools.
Explanation:Trade fairs and exhibitions are media used for sales promotion.
They allow companies to display new products directly to the public.
These events help attract potential customers and encourage them to place orders.
They also give businesses a chance to collect feedback from the market.
Attendees can see, examine, and buy the displayed goods and services on the spot.
Therefore, they mainly support selling and promotion rather than market segmentation or customer service.
Answer:Sales promotion.