A marketing letter, also known as a sales letter, is a form of direct mail that is sent from an advertiser to potential customers. A successful marketing letter must grab your reader's attention, quickly demonstrate your purpose and end with a compelling argument, says Entrepreneur.
While having a "form" letter on hand is a good idea, it is recommended that you take the time to personalize the letter to your individual target's needs. This helps to establish and maintain a relationship with your audience. The marketing letter is an important tool in your marketing strategy, if they are utilized correctly.