Verified answer

*** it-1 p. 651 Dream ***

When Jesus Christ stood on trial before Pontius Pilate, the Roman governor’s wife sent him this message respecting Jesus: “Have nothing to do with that righteous man, for I suffered a lot today in a dream because of him.” (Mt 27:19) Evidently of divine origin (Jehovah God), the dream should have warned Pilate that Christ’s case was one of extreme importance.

I'd imagine so... Pilate's wife could conceivably have convinced him to release Jesus (of course, I'm sure the Jews would have found a way to have him killed anyway), but he didn't despite knowing that Jesus was powerful and innocent.

Apparently. For, the devil would not give her a dream proclaiming Jesus' innocence so that she might go and try to convince her husband, Pilate, to let Jesus go. A kingdom divided against itself cannot stand (Matthew 12:25,26).

I believe it to be.

In Matthew's infancy narrative, dreams are the means of divine communication