The various types of tyres are:
Tubetype: air chamber mounting.
TL ready or Tubeless Ready: Tubeless mounting (without inner tube) with prevention.
Tubeless: Tubeless mounting (without inner tube).
The tyre and rim form a watertight unit thanks to their specific tyre triangles. Thus, the edges "hook" into the sides of the rim. The rim must be completely watertight. Some are specifically designed for tubeless. Others can be converted to tubeless by means of a specific mounting.
Tubeless allows you to ride at lower pressures and limits the risk of punctures. Tubeless Ready tyres have been developed to reduce weight, while maintaining the tubeless rims so that the tyre can be clipped onto the rim. Tubeless Ready tyres require the use of a preventive fluid to waterproof the tyre casing. It resembles a Tubetype casing (inner tube).