What's the difference between ulong4* and ulong4 ? What's the meaning or purpose using * symbol?

Question

For example:

__global uchar* hashes

inside https://github.com/djm34/sgminer-msvc2015/blob/master/kernel/lyra2Z.cl program

My Question is not about pointer,

I'm not asking about
*variable_name

but about
data_type*

Answer 1

https://www.sololearn.com/learn/C/2933/