An example of usage (I had no phone or Internet at that time). Say you wanted to view the Formula 1 results , you open the TV, press the Teletext button then you would have to find from a table of content like page the number code/ID for the Formula 1 results , so it could be

311 - Formula 1 results

312 - Formula 1 pilots current points/results

313 - Formula 1 team points/results

football stuff could probably start at

301 - last week football results

302 - football stuff ###

So after you used it a few times you would remember that sport stuff is starting at 300 , 301 -310 is football 310 -314 Formula 1 etc so you could just do

1 open TV

2 press teletext button

3 enter code from memory 311

4 view the information

Since there was no internet there was no other way to see this data anymore, so it was the only information on demand we had.

There was also a nice weather info page, I think it included more then a day so it was better then waiting for the news to hear the weather person tell you something.

It sounds (and looks) primitive by modern standards, but it was actually a wonderful technology that worked perfectly well for its intended purpose and was very information-dense. Sadly, we lost Teletext in the UK during the changeover from analogue to digital TV, but I think it's still alive in a number of countries.