Albert Barnes Commentary Psalms 66:1

"Make a joyful noise unto God, all the earth:" — Psalms 66:1 (ASV)

Make a joyful noise unto God - literally, “Shout.” It is a call for exultation and praise.

All ye lands - Margin, as in Hebrew, all the earth. The occasion was one that made universal exultation and praise proper. Those who had been so deeply affected by the gracious interposition of God, could not but call on all the nations of the earth to unite with them in the expression of joy. The deliverance was so great that they wished all to rejoice with them (Compare to Luke 15:6 and Luke 15:9); and the intervention of God in the case of his people, provided lessons about his character which gave all people occasion to rejoice.