If you praise someone or something, you express approval for their achievements or qualities.

Praise is what you say or write about someone when you are praising them.

If you praise God, you express your respect, honour, and thanks to God.

Praise is the expression of respect, honour, and thanks to God.

If someone damns something with faint praise, they say something about it which sounds quite nice but is not enthusiastic, and shows that they do not have a high opinion of it.

If you sing someone's praises, you praise them in an enthusiastic way.