What are the real world applications of triple of water? And is it worth researching what factors could effect it?
It is a way to establish an accurate temperature. In the past, it was used as the definition of 0.01 C.
Here is one: A special condition of the triple point- its particular value at atmospheric pressure- is the thermodynamic limit of superheat, which is of vital importance in the design and operation of thermal inkjet printheads.