In traditional toilets, the inner pan is surrounded by a rim, and when you flush, water is distributed from underneath the rim to flush away waste. On the other hand, rimless toilets don't require a rim because their flushing system distributes water all the way around the pan.
The simplicity of cleaning that a rimless toilet offers is a huge benefit. You can make contact with the entire inner bowl because it lacks a rim. Waste is always flushed down completely because there are no hidden crevices or cracks. This encourages improved health and hygiene.
Because of the way the water is swirled around the bowl during flushing, rimless toilets use less water than conventional toilets.