Internet Protocol television (IPTV) is a system through which television services are delivered using the internet protocol suite over a packet-switched network such as the internet, instead of being delivered through traditional terrestrial, satellite signal, and cable television formats.
IPTV services may be classified into three main groups:
§ live television, with or without interactivity related to the current TV show;
§ time-shifted television: catch-up TV (replays a TV show that was broadcast hours or days ago), start-over TV (replays the current TV show from its beginning);
§ video on demand (VOD): browse a catalog of videos, not related to TV programming.
In short, IPTV helps you to become the master of your television set, not the slave. You can watch your favorites at your convenience.