Why are DWORD values commonly represented in Hexadecimal?

I am trying to understand why a DWORD value is often described in Hexadecimal on MSDN.

The reason why I am analyzing this is because I am trying to understand fundamentally why all these different number data types exist. A local mentor alluded to me that the creation of DWORD and other Microsoft types had something to do with the evolution of processors. This gives meaning and context to my understanding of these data types. I would like more context and background.

Either way, I could use some explanation or some resources on how to remember the difference between DWORD, unsigned integers, bytes, bits, WORD, etc.

In summary, my questions are: 1) Почему DWORD представлены в шестнадцатеричном формате? 2) Can you provide resources on the differences between numerical data types and why they were created?