This is a great call that the psalmist makes so that all peoples would come to praise God, who is great in mercy and power. He is the almighty God, because His mercy endures from generation to generation.
It is good to see this call made by this great man of God. He mentioned Israel and also all peoples, urging them to recognize that they exist thanks to the mercy of the Lord, and that this mercy is upon them. Let us all praise the King of kings and Lord of lords.