Have you ever wondered just how many times you should send an email to your customers/audience?  Do you want to know why people are opting out of your social media campaigns.  This great study on effectiveness of social media and email marketing is a great read.   You will find out the top reasons people unsubscribe for email, Facebook and Twitter…. In short, content is king (information that helps them, not you, i.e. marketing speak and also make sure the content is fresh) and don’t swamp them in too many emails.