what does IBV_WC_SUCCESS mean?

I am a newbie in RDMA.

I try to write data from local memory to a remote machine with IBV_WR_RDMA_WRITE (I use unreliable connection), and then I try to poll a completion event and its status is IBV_WC_SUCCESS, I am curious does this status mean the data is already successfully written to the remote machine?

Many thanks for you time and patience.