Praise the Lord an extol his name

Psalm 117:1-2
Praise the Lord, all you nations; extol him, all you peoples.
For great is his love toward us, and the faithfulness of the Lord endures forever.
Praise the Lord.
Who should praise the Lord ? all nations and all peoples.
Why we should extol his? For the great of his love toward us and the faithfulness of the Lord endures forever.
Why?
Some do not know the Lord so they do not praise the Lord and worship Him.
The psalmist calls all nations to praise the Lord. In his love ad constant care for Israel he shows his purpose for every nation(Romans 15:11). “Praise the Lord, all you Gentiles; let all the peoples extol him.”
How?
Praise the Lord, for the love toward me and his faithfulness endure forever.