Psalm 150:1-6 KJV
Praise ye the Lord . Praise God in his sanctuary: praise him in the firmament of his power. [2] Praise him for his mighty acts: praise him according to his excellent greatness. [3] Praise him with the sound of the trumpet: praise him with the psaltery and harp. [4] Praise him with the timbrel and dance: praise him with stringed instruments and organs. [5] Praise him upon the loud cymbals: praise him upon the high sounding cymbals. [6] Let every thing that hath breath praise the Lord . Praise ye the Lord .
(source: google.com)
Praising the Lord is the moment of showing appreciation or giving thanks for either what the Lord has done, doing or that He will do.
It is a powerful thing that brings the hand of God even God Himself to the place of worship. Just like it happened in th reign of King Solomon.
2 Chronicles 5:13-14 KJV
It came even to pass, as the trumpeters and singers were as one, to make one sound to be heard in praising and thanking the Lord ; and when they lifted up their voice with the trumpets and cymbals and instruments of musick, and praised the Lord , saying , For he is good; for his mercy endureth for ever: that then the house was filled with a cloud, even the house of the Lord ; [14] So that the priests could not stand to minister by reason of the cloud: for the glory of the Lord had filled the house of God.
God can be praised anywhere at any point in time. It could be within our heart, without opening of our mouth or in the church where it is allowed to have a orchestrated music. He is everywhere to receive our praise.
There is always a reason for praising God. His mighty acts do not have replica neither His greatness, for it is second to none. He created the world and everything in it greatly. What a mighty God. Therefore, everything that has breath should praise the Lord.
Praise ye the Lord!