Supermarkets use a variety of tactics to influence customers and encourage them to spend more money. Some of these tactics include:

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Attractive displays and product placement
Supermarkets are designed to be visually appealing and to make products look appealing. For example, they may use bright colors, attractive packaging, and carefully arranged displays to make products look more appealing and grab customers’ attention.
In-store promotions and discounts
Supermarkets often offer promotions and discounts, such as buy-one-get-one-free offers or coupons for certain products. These promotions can be a powerful motivator for customers to make additional purchases, and they can make it difficult for customers to resist the temptation to buy more than they had planned.
Impulse buying
Supermarkets are designed to make it easy for customers to make impulsive purchases. For example, they may place small, low-priced items near the checkout counter, where customers are more likely to see them and be tempted to buy them on a whim.
Limited-time offers
Supermarkets often use the tactic of offering products or promotions for a limited time only. This can create a sense of urgency for customers, who may feel like they need to make a purchase quickly in order to take advantage of a deal before it expires.
Keeping things apart
If you want to buy bread and butter then supermarkets deliberately put these two apart from each other. It makes the buyer buy more things while going from one product to the other item in the supermarket.
Huge shopping cart
They design carts in big sizes. It makes a buyer feel that they bought very few things.
High-margin items at checkout
They put the high-margin items at checkout so that buyers can put them in the cart while waiting in line.
Overall, supermarkets use a variety of tactics to influence customers and encourage them to spend more money. These tactics can be effective at driving sales and increasing revenue. But they can also make it more difficult for customers to stick to their budgets.