Regarding this question, Amazon Direct is an advertising service provided by Amazon to help sellers increase product exposure and sales on the Amazon website.

Sellers can create advertising campaigns on the Amazon platform, select keywords and bids, and then display ads to target customers. When customers click on the ads and buy the products, the seller needs to pay a certain advertising fee to Amazon.

Amazon Direct ads are usually billed on a PPC (pay-per-click) basis, and sellers can optimize advertising results by analyzing and adjusting advertising campaigns in real time.