Back in 1997, loyalty programs were a concept really only in play at major retailers and airlines. Today, the technology has become affordable and accessible to even the smallest businesses.

Loyalty Marketing, commonly referred to as Frequency Marketing or Relationship Marketing, is a long-term marketing strategy focused on the identification, retention and growth of a store's customers by communicating to them and recognizing and rewarding them based on positive purchase activity.

The frequency in which one could expect to receive direct marketing emails depends on which service is providing the emails. It also could vary depending on the options selected by the recipient upon sign up.

The ration of a frequency to its total frequency is called relative frequency.

"With the increasingly sophisticated use of the world wide web and advent of web 2.0, permission marketing is used with a lot more effect and frequency today than when it was first introduced. By having customers receive the advertising they have indicated an interest in, they are more likely to respond and purchase the product."

1. Content Marketing

2. SEO (Search Engine Optimization)

3. SMM (Social Media Marketing)

4. Paid Advertising

5. Email Marketing

6. Instant Message Marketing

7. Affiliate Marketing

8. Influence Marketing

9. Mobile Marketing

10. Video Marketing

11. Audio Marketing

12. Virtual Reality Marketing