From Amazon's site: "To give customers the best possible shopping experience, sellers must meet performance-based requirements to be eligible to compete for Buy Box placement.". If your company meets those requirements, you can start the procedure.
What do you mean with "make business"? Since all such sites have different procedures, the "etc" doesn't make sense. For each site you'll have to follow their own procedure.
How to make business on E-Commerce Amazon , Ebay ,etc . and how to target Buy Box ?

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