Adult Internet Dating Service is a dating system which allows individuals, couples and groups to make contact and communicate with each other over the Internet, usually with the objective of meeting friends or potential sex partners. The catch point of such sites is to appeal internet users that they can have a wider prospect of meeting singles, whom they possibly wouldn't meet in daily.

To join, users have to register which is often free of cost for basic services. However a fee is charged for premium services like refined search and priority in placement. Once registered, users have to develop their profile with pictures and preferences. The idea is to make it attractive and sensual so that it can attract more members. Most of the dating sites are moderated to avoid fake memberships. One can start using his/her account once it is approved by the site moderator.

Search is the most important feature of these sites which allows member to filter users in various categories based on body features, age, preferences and location. Once zeroed in potential dates, users can send an Email or IM to start with can add them as friends and can be proceed to intimate dates. Such sites publish a number of success stories where couples give credit for their relationship to the dating site.

Adult dating sites generate highest number of paid users on internet after pornographic websites. Sites which offer free service, generate their revenue through advertisements.
There are many controversies about the functioning of online dating sites. Databases are not updated often which shows inflated membership. It results into a large number of dormant members. Most of these sites have very uneven gender ratio. There are a large number of fake profiles which result into cheating of users. These sites are used by internet predators hunting for unsolicited information from users which is used for spamming.

As the online dating population is on rise, sites with specific demographics are becoming more popular as a way to narrow the pool of potential matches.