Advertising is the action of calling public attention to a product or service. It is everywhere: on billboards, in feeds, before videos, on the sides of buses. It pays for most of the free content you consume. It is also one of the most powerful forces shaping modern culture.

Advertising works by creating desire. It does not just tell you what a product does. It tells you what the product means. A car is not just transportation. It is freedom. A soft drink is not just sugar water. It is happiness. Advertisers use psychology: social proof, scarcity, emotional appeals, repetition. The industry has changed dramatically with the internet. Targeted ads follow you around. Influencers sell products in their posts. Native ads look like articles. Regulators struggle to keep up. Critics say advertising manipulates and creates false needs. Defenders say it informs and funds free media. Both are right. The question is how to live with it without being taken in.

Common techniques

• Emotional appeals
• Social proof: everyone is doing it
• Scarcity: limited time offer
• Repetition: keeping the brand top of mind