It's called the expression of approval...

Potency of Praise
It's called the expression of approval or admiration for someone or something. Synonymous to commendation, eulogy, laudation. Another call it Praise.

Praise is one of the most potent forces on this earth. It is a supernatural force. Seen a musician  praise a billionaire, millionaire or thousandnaire? He is blessed by that man after singing loud his good deeds or his good names. If praise can move someone you love not in your favour how much more someone you love.

Watch a man praise his wife when well dressed saying "Baby you look gorgeous" or her food "mummy this tastes good". She dazzles with smile and would always want to look and cook her best for him. That's the potency of praise. It adds more value to the praiser and the praised.

Remember the man called David, his continual praise to God earned him a title "A man after God's own heart". Also will your praise move God. It can bring your right before his presence, a private audience. It's the quickest, shortest connection to God. It propels God to act on your behalf. It's a force. No wonder the psalmist called it strength...the Potency of Praise