By using Facebook product ads, advertisers will have the flexibility to either manually upload their product catalog and create campaigns promoting certain products to specific audiences, or use Facebook Custom Audiences to automatically deliver the most relevant products to target consumers. With automatic delivery, Facebook will turn off ads for products when they are out of stock. Some brands have already tested the new ad solution, and are reportedly seeing positive results. Target said in a statement that by using product ads, it saw a 20 percent increase in conversion compared to other Facebook ads. David Spitz, president and chief operating officer (COO) at digital publishing platform RebelMouse, thinks that with the launch of product ads, Facebook will be able to offer ads for multiple products based on a user's interest. "For example, I like Nikes and looked to purchase Nikes on footlocker.com. Now when I'm on Facebook, I'm delivered an ad that has those Nikes plus other relevant sneakers that are similar, so I'm drawn in on that personal level," Spitz says. Get the full story at Facebook