Teletext is a television news service that provides text-based information and news updates. It was first introduced in the 1970s and is still used today in some countries. Teletext is transmitted over the airwaves and can be accessed through a television set or a set-top box. The service provides news, sports, weather, stock market updates, and other information. It is also used to provide subtitles for television programs. Teletext is an important source of information for many people around the world.