IPTV is essentially the delivery of media content, videos or live television over an IP network. This can either use the public internet or a private local area network (LA) or wide area network (WAN). An IPTV service can be delivered to an IP enabled TV, mobile phone, tablet, laptop or PC and can be easily incorporated into a video on demand solution.
IPTV is commonly used by businesses and organisations to deliver TV to waiting areas, reception and common rooms (often integrated with digital signage capabilities). IPTV is also a popular solution for the provision of television services within a hotel, hospital or residential property.
Here are some other helpful descriptions;
Internet Protocol television (IPTV) is a system through which tv services are delivered using the internet protocol suite over a packet-switched network such as a LAN or the internet, instead of being delivered through traditional terrestrial, satellite signal, and cable television formats.