Email marketing can be one of the best things a business can invest in, because when it is done correctly the return on investment is very high.
Marketing through email is a great way to build a relationship with your customers. You can use it many different ways but the most effective campaigns do a combination of teaching, entertaining and selling.
You can use your email list to build relationship with your subscribers and in turn build trust. People are more likely to buy off of someone they trust then someone that is only trying to sell them something.