What does it mean when the Bible said that Angels came and ministered to Jesus after He was tempted by the devil?
Jesus was in the desert regions. Jesus had eaten nothing for forty days and forty nights. After such a time of deprivation, he would not - humanly - have had the strength to get back to civilisation to find food. Close to death from starvation, and now no longer capable - independently - of obtaining food, Jesus was in dire need of help.
Malak in Hebrew is not specific and can mean either 'messenger' or 'angel'. It is translated both ways, mostly 'messenger' and Malachi bears the word as his name.
But I think that the Greek aggelos is more specific than the Hebrew. And the abundant use of the word in the book of the Revelation indicates just how much angelic activity there is on earth - and, particularly, in association with the Gospel of God and with the people of God.
Also, the wording of the text in question, Matthew 4:11 :
Then the devil leaveth him, and, behold, angels came and ministered unto him [KJV]
indicates a juxtaposition of Diabolos and the 'messengers/angels' who ministered to him and I would see that there is almost a certainty that these were angelic beings sent on this specific occasion to protect and to succour Jesus in his extreme condition.
Here the simple meaning is correct. After Jesus was tempted by Satan Angels came to him to encourage him in a sense.
Jesus spends 40 days and 40 nights in the wilderness. During that time, he eats nothing. Then, when Jesus is very hungry, Satan the Devil approaches to tempt him, saying: “If you are a son of God, tell these stones to become loaves of bread.” This must have been hard for him and he would need encouragement.