Wholesaling is like when you buy a lot of toys from a store and then sell them to your friends for more money.
Imagine you go to a toy store and buy a whole bunch of toys in bulk. This means you buy a lot of the same toy all at once. The toy store gives you a discount because you buy so many toys at once. Then you sell those toys to your friends for a little bit more than what you paid for them. Your friends are happy because they got a toy they wanted for a good price, and you make a little bit of money for yourself.
This is what it means to wholesale – you buy a lot of the same thing (like toys) from a store at a discount, and then sell them to other people for a little bit more money. Wholesalers are like middlemen – they're not making the toys themselves, but they're buying them from the people who do and then reselling them to others.
Wholesaling is used by lots of different businesses, not just toy stores. For example, a grocery store might buy a large quantity of apples from a farmer and then sell them to customers at a markup. A clothing store might buy a bunch of shirts from a manufacturer and then sell them to customers in their store.
Overall, wholesaling is a way for businesses to buy large quantities of things at a discount and then sell them to others for a little more money.