Quality, cost, delivery

Quality, cost, and delivery are all important factors in deciding what to buy.

Quality is how well something is made. It measures how long something will last and how well it will do its job.

Cost is how much money something costs. It's important to find something that is not too expensive and not too cheap, since things that are too cheap may not be made very well.

Delivery is how quickly something can be delivered to you. When you need something delivered quickly, it will usually cost more money.