Fax marketing, while an older strategy, it remains a viable method of advertising, and can rich people that other methods can not.

Email marketing is a cheap, fast way to reach a large base of customers with ritch content, and unlike direct mail or fax, it's easy to track its effectiveness electronically.

Short message service (SMS) marketing, even though it is more expensive and restrictive than email, it stands out by being more personal and having near to 100% open rate.