Worship is “obedience” from an honest good heart.
Jesus (being God) said that God seeks these kind of persons to give Him this kind of worship (John 4:23) .
To God, any efforts toward Him (prayers, church attendance, money, songs, raise and testimonies, etc.) if we are, knowingly, in disobedience to something we know He wants of us is NOT worship. Other activities called worshiping are at that point what HE calls “vain worship”. Vain worship is rejected by JESUS (Luke 8:15, James 1:26, Mark 7:7).