This document discusses external marketing channels such as Facebook, Twitter, YouTube, and Instagram. It provides tips for using each channel to promote a business. Facebook channels include pages and ads, which can be used to build awareness, generate leads, and increase sales. Twitter tips include using keywords, hashtags, images/videos, follower interaction, and campaigns. Instagram recommendations are creating compelling content, establishing a brand look, writing captions, hashtags, audience engagement, and story highlights. YouTube suggestions are optimizing, scheduling, and sharing videos, as well as allowing influencers to promote content.