Your advertising should be about performance; your customer should do something following your advertisement, not just acknowledge it with a nod. And that means you must have a system for tracking and measuring the success of a campaign, a compelling message and a clear call to action that motivates your customer to act. By that [...]

If you segment your list into smaller groups using some criteria (by the product name, or list name, or frequency, etc.), testing is the only way to know what each group is looking for. Once you identify what they want, you can send them more relevant information, keeping your statistics high and complains low. In [...]