It could give a much-needed boost to Amazon's e-commerce business.

Does this situation, described in a recent Amazon ( AMZN -0.61% ) news release, ever happen to you?

"You place an Amazon order, then realize there's something else you need.... Maybe it's five minutes later. Maybe five hours. Either way, you'd like it delivered with your next order."

Well, it happens to me. All. The. Time. But up until now, when it happened, I just had to suck it up, put on pants, and head to a local retailer to get what I wanted -- or go without.

Now, however, Amazon has rolled out a new Prime perk called Add to Delivery. Not only will it solve this problem, but it could also meaningfully boost the company's e-commerce bottom line. Here's what investors need to know.

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