Facebook has resisted the practice of pre-roll ads. Now, according to knowledgeable advertisers, in a major shift the company says it plans to test such ads for Watch shows. The ban on pre-roll ads came directly from chief executive Mark Zuckerberg who stressed that users came to the site to look at a feed, not watch one specific piece of content. This year, however, Facebook debuted Watch, where TV studios, publishers and celebrities can try to sell advertising against their shows, an ideal format for pre-roll ads. Continue reading Facebook Lifts Ban on Pre-Roll Ads, in Beta Tests for Watch