I think advertising is a big reason why people buy things they don't really need. Ads make products look really cool or important, so people feel like they have to buy them. Also, when there are big sales or discounts, people rush to buy things just because they think it's a good deal, not because they actually need them.

Sometimes people buy things they don't need because of their feelings. For example, when someone is stressed or bored, shopping can make them feel better. Some people also buy things as a reward for themselves, or just to feel happier for a while.

Peer pressure is another reason. If your friends or classmates have the latest phone or wear trendy clothes, you might feel like you need to buy the same things to fit in. Seeing others with new stuff makes people want to have it too, even if they don't really need it.

I think convenience is a big factor too. Online shopping makes it super easy to buy things quickly, sometimes without even thinking. Free shipping or special discounts make people want to buy more, even if they don't actually need those items.