For example, consumers are more likely to purchase the product after a supermarket tasting event

Students are more likely to sign up for paid courses after free trial courses

For example, gift exchange between friends deepens friendship

Helping colleagues builds mutual trust at work

For example, corporate donations to the community in exchange for a good public image

Such as politicians’ community service in exchange for voters’ support

Such as supporting a movement on social networks and continuing to participate in related activities

For example, after expressing support for a certain issue in public, you also support it in action

For example, if a company makes a commitment to environmental protection, it will use sustainable materials in product design.

For example, after the government announces reforms, it reflects its commitment in policy implementation.

If experts continue to provide accurate information and are trusted by the public

If a brand maintains product quality over a long period of time and wins loyal customers

For example, it is easier for police or military personnel to obtain cooperation from the public when performing their duties.

For example, a doctor or lawyer is trusted because of their professional image

For example, parents’ suggestions for their children’s education are usually taken seriously

For example, teachers’ opinions on academic issues are usually accepted by students

For example, business leaders motivate employees by setting an example

For example, a coach can improve the team's execution by demonstrating professional abilities.

For example, limited-edition sneakers cause panic buying

For example, limited edition artworks attract high bids from collectors

For example, limited-time discounts encourage consumers to place orders quickly

For example, countdown rush sales activities increase the sense of urgency

For example, the limited number of places in popular courses leads to competition among students

If a shortage of housing stock triggers bidding among buyers

If you meet someone at the gym who also likes running, you can easily become friends.

Such as establishing a good relationship between colleagues due to common work interests

For example, it is easier for alumni to cooperate because of their common school background.

Like fellow villagers who help each other because of their common geographical background

For example, salespeople increase customer loyalty by building friendships

If a company wins customers' favor by providing excellent customer service

If you place mid-range products next to high-end products, they will appear more affordable.

For example, a food stall near an expensive restaurant may look cheaper

For example, when displaying products, first introduce competing products with inferior functions.

For example, when recruiting, interview candidates with mediocre qualifications first.

For example, in car advertisements, one’s own car model is compared with competing products.

For example, clothing brands emphasize the uniqueness and fashion sense of their designs.