This is again the second sign that Jesus did, having come out of Judea into Galilee.
This miracle, as the first one that John described, had a limited audience. Only the family and household servants of the official knew of it at first. This was typical of Jesus’ ministry. While Jesus performed many public miracles, and huge crowds followed Him because they witnessed them, they had the desired impact on relatively few individuals (cf. John 1:11-12).