Jeff Bezos’ successor as CEO runs Amazon Web Services. What, exactly, is that?

In the popular imagination, Amazon is a big huge store run by Jeff Bezos, a smiling man with a clean-shaven head who is, sometimes, the richest person in the world. You order and Amazon delivers. Because it’s a big, huge store that wants to be bigger and huger, you can also stream TV shows and buy Amazon-branded personal gadgets and Amazon-branded home security devices. You can order groceries there, too. This is a version of the story Amazon has been telling about itself, to customers, si