EBay Inc. is the second-largest marketplace in the U.S. and one of the top marketplaces in the world. But it has been growing much slower than the overall U.S. e-commerce market, mainly because of big competition from Amazon.com Inc.’s marketplace. Still, eBay has millions of sellers and more than one billion products listed on its marketplaces. The company has made efforts to spur growth over the last two years through increased marketing to attract more eBay buyers and its structured data initiative, which helps customers find products on eBay.com.