3. Voip is an extremely cheap way to phone using the internet. Saves money and is easier to set up than a basic phone line with companies like Sky or Virgin Media.
5. VoIP is free for the majority, generally only costs for across seas. So this drastically decreases costs
6. It is used daily by Xbox Live since 2005, Playstation Network since 2006, and Skype since 2003. There are many other ways it is used, but these 3 are the most popular ones
7. One of the only downsides to VoIP is the servers go down more than conventional phone lines, so it is less reliable than landlines