Related to or designed to promote or advertise something, like a product, event, or idea; used to increase awareness or sales.
From 'promote' (Latin 'promovere': 'pro-' forward + 'movere' to move), meaning originally to move something forward or advance. The adjective 'promotional' emerged in the early 1900s with the rise of modern advertising and marketing.
Promotional items like branded pens and t-shirts actually work because of 'mere exposure effect'—the more you see a brand name, the more your brain trusts it, even if you don't consciously remember where you saw it! Companies literally understand psychology.
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