What does Zechariah 11:15 mean?

I said to them, “If you think it best, give me my wages; and if not, keep them.” So they weighed for my wages thirty pieces of silver.

Yahweh said to me, “Throw it to the potter, the handsome price that I was valued at by them!” I took the thirty pieces of silver, and threw them to the potter, in Yahweh’s house.

Then I cut apart my other staff, even Union, that I might break the brotherhood between Judah and Israel.

For, behold, I will raise up a shepherd in the land, who will not visit those who are cut off, neither will seek those who are scattered, nor heal that which is broken, nor feed that which is sound; but he will eat the meat of the fat sheep, and will tear their hoofs in pieces.

Woe to the worthless shepherd who leaves the flock! The sword will be on his arm, and on his right eye. His arm will be completely withered, and his right eye will be totally blinded!”