Amazon's Prime Day Begins Today. Here's What You Need to Know.

Amazon kicks off its annual Prime Day event today. Since it was started in 2015, the event has become hugely impactful for the company's bottom line-and for competitors'. WSJ's Amazon reporter Sebastian Herrera joins host Amanda Lewellyn with more on the event, and what you should know before you decide to shop. Learn more about your ad choices. Visit megaphone.fm/adchoices