Of course, the more valuable and relevant the content is, the more likely your customer is to share it, which is why e-mail marketers have always placed a great deal of importance on sharing tools such as forward-to-a-friend. It's easy today to add social media sharing links to e-mail campaigns, so make sure you are in sync with your fellow marketers. The more opportunities you provide for the customer to share your content, the more likely you are to create new subscribers and customers who want to talk about your brand.