Facebook Chairman and CEO Mark Zuckerberg testifies at a House Financial Services Committee hearing in Washington, October 23, 2019.Erin Scott | ReutersMark Zuckerberg spent the majority of Facebook’s Wednesday earnings call outlining the company’s e-commerce strategy, which will be crucial to how the social media company grows its ad business in the wake of one of the biggest changes to mobile ad targeting.The company’s most popular e-commerce offering today is Marketplace, where users can buy and sell goods from one another directly through Facebook. Zuckerberg said that Marketplace now counts more than 1 billion monthly users.Zuckerberg also talked about Facebook Shops …
