What is the benefit of using a mixer tap instead of a separate hot and cold water tap?

A mixer tap combines the hot and cold water before it reaches the spout and allows you to adjust the water temperature as it flows, rather than adjusting it when it’s already in the basin. Mixer taps don’t have traditional washers that need changing as they use a ceramic disc system to control the water. Mixer taps are also supplied with flexible hoses that make installation much easier than traditional ridged pipes.