The abbreviation CATV is often used for cable television. It originally stood for Community Access Television or Community Antenna Television, from cable television's origins in 1948. In areas where over-the-air TV reception was limited by distance from transmitters or mountainous terrain, large "community antennas" were constructed, and cable was run from them to individual homes. The origins of cable broadcasting for radio are even older as radio programming was distributed by cable in some European cities as far back as 1924.
You could use a number of approaches when faced with the challenge of "How to find cable TV providers near me?" You could spend hours surfing the internet, going through the process of entering your information into each provider's website to see if they service your area. It would be much more effective, however, if you could narrow the search down to the best cable providers in your area before diving into the shopping phase.
The question of "when does it make sense?" can easily be rephrased as "how much money can I save?" and one of the biggest factors will be the price difference between combined internet and TV service or just internet. These are also the options that vary the most widely based on where you live, and the availability of promotions or contracts that can keep prices down for a short time.