We get it: Sometimes, social media still feels like the new kid on the block. Email laid the foundation for online marketing — indeed, for the entire internet — all the way back in 1971. Google was valued at $100 billion before Twitter even existed. But today, social media deserves to sit at the center of your entire marketing strategy. Not just because it delivers the largest audience in the history of marketing (though, with 2.9 billion people using Facebook each month, it does.) Not just because it offers the best targeting of any marketing channel today (though, in a world dominated by cookie deprecation and iOS 14, it does). And not just because it offers the best performance of any channel today (though, in survey after survey, marketers report that it does). The real reason you should use social media as the centerpiece of your...