An online community, also called an internet community or web community, is a whose members interact with each other primarily via the Internet. For many, online communities may feel like home, consisting of a "family of invisible friends". Those who wish to be a part of an online community usually have to become a member via a specific site and thereby gain access to specific content or links. An online community can act as an information system where members can post, comment on discussions, give advice or collaborate. Commonly, people communicate through social networking sites, chat rooms, forums, e-mail lists and discussion boards. People may also join online communities through video games, blogs and virtual worlds. The rise in popularity of Web 2.0 websites has allowed for easier real-time communication and connection to others, and facilitated the introduction of new ways for information to be exchanged.