Amazon and start-ups compete for the instantaneous delivery dollar.

Retailers are using what they learn online to sell you stuff in the store.

Hint: Soon.

It's tough to detect or beat systems that show you "personalized" prices for products

Wedding clothes rentals are officially online.

Kai Ryssdal talks to Katrina Lake, founder and CEO of Stitch Fix.

…69 percent of Americans shop online.

For online retailers, replacing brick-and-mortar stores is a logistical problem.

But, of course, the web is tough for traditional retailers.

Brick and mortar retailers are hitting back against customers who shop in the store, but buy online.