VoIP is an acronym for Voice Over Internet Protocol, or in more common terms phone service over the Internet. If you have a reasonable quality Internet connection you can get phone service delivered through your Internet connection instead of from your local phone company and benefits will be endless.
VoIP offers a low cost; phone service via VoIP costs less than equivalent service from traditional sources. For example, users see VoIP phone calls even international ones as free. While there is a cost for their Internet service, using VoIP over this service may not involve any extra charges, so the users view the calls as free. On the other hand VOIP makes easy some things that are difficult to impossible with traditional phone networks like incoming phone calls are automatically routed to your VoIP phone where ever you plug it into the network. Take your VoIP phone with you on a trip, and anywhere you connect it to the Internet, you can receive your incoming calls. In other words VoIP features many advantages over traditional phone services many of which stand out functionality and low cost.