Question

what is the advantage of wholesalers

Answer 1

Wholesalers sales his goods to retailers, and retailers sells his goods to Consumers. Wholesalers works as middleman from production of goods till consumption of goods.
He makes goods available to the Market.

Answer 2

1. Provide Access to Products 
2. Provide Access to Markets 
3. You’ll save money and make more money.
4. You’ll create and propagate your own brand.