Amazon has found success in many industries, but it once had some serious competition in the footwear sector ... until it bought the other company.

Both Zappos stores in Louisville, Kentucky, including the Outlet and the Mall St. Matthews location, have permanently closed.

By mass-scaling online videos and focusing on efficient key word usage, the Internet shoe retailer achieved superior exposure among its target audience. With a test of more than 21,000 shoe-related ...