E-mail marketing for commercial or informational use differs from other “traditional” marketing tools because it:
Allows a customized and exclusive offer to be sent to each person through an immediate medium like e-mail.
The costs of the means of advertising is very low. This means that companies will no longer be subject high budgets. The results can be measured almost immediately with a max of two days. In addition, the ability to ‘test’ is almost endless custom elements effectiveness can be measured by the effectiveness of each campaigns.