/s
(a tag I wish I didn't have to append)
Sad choice of terms.
Mutation is a well known genetic phenomenon.
Beneficial mutations are not.
I suspect that the term mutation here is used in its general sense of any kind of change in genetic material.
Many microorganisms have the ability to pick of free DNA/RNA in, say, an infection environment and incorporate it into their own genetic code.
This makes no case for the twilight zone macroevolution the modern pseudos teach.