Social network marketing or social level marketing, is a advertising method that makes use of social network service and to increase their web presence. This ranges from simply advertising directly on social networking sites, viral marketing that spreads throughout the web, email, and word of mouth, or providing niche social networking sites focused around the item being advertised.

Many sites include features where companies can create profiles. For example, on Facebook companies can create "pages" where users can become fans of this company, product, service, individual, etc. Many companies create MySpace pages for themselves.