Online dating sites use market metaphors to match people.
Most sites allow members to upload photos or videos of themselves and browse the photos and videos of others.
Sites may offer additional services, such as webcasts, online chat, telephone chat (VOIP), and message boards.
Some sites provide free registration, but may offer services which require a monthly fee.
Other sites depend on advertising for their revenue.
Some sites such as Ok Cupid.com, and are free and offer additional paid services in a freemium revenue model.
Some sites are broad-based, with members coming from a variety of backgrounds looking for different types of relationships.
Other sites are more specific, based on the type of members, interests, location, or relationship desired.
Online dating or Internet dating is a personal introductory system where individuals can find and contact each other over the Internet to arrange a date, usually with the objective of developing a personal, romantic, or sexual relationship.
Online dating services usually provide unmoderated matchmaking over the Internet, through the use of personal computers or cell phones.