I don't find a correct explanation of what's the differences or what's the use cases between bind and get/set attribute in vop.

Do someone has some good references on this ?

“Get Attribute” VOP imports given attribute from given file or input.
“Bind” VOP adds attribute.
“Set Attribute” VOP sets attribute value if it already exists.
“Add Attribute” VOP is similar to bind VOP and maps attribute. Mapping is the major difference between bind and addAttribute.