There are many false God, and we must know how to recognise the Almighty God, and the Bible told us how to identify the true and living creator of humanity.
False gods can be anything that you worship over the living God, such as money, house, job, electronic equipment, cars, gambling and lust. Anything that you put before God is worshipping that thing over Him.
Exodus 20:2-6 I am the Lord thy God, which have brought thee out of the land of Egypt, out of the house of bondage. Thou shalt have no other gods before me. Thou shalt not make unto thee any graven image or any likeness of anything that is in heaven above, or that is in the earth beneath, or that is in the water.
Thou shalt not bow down thyself to them, nor serve them: for I the Lord thy God am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of them that hate me; And shewing mercy unto thousands of them that love me and keep my commandments.
Exodus 34:14 For thou shalt worship no other god: for the Lord, whose name is Jealous, is a jealous God:
Deuteronomy 32:17 They sacrificed unto devils, not to God; to gods whom they knew not, to new gods that came newly up, whom your fathers feared not.
Deuteronomy 12:32 What thing soever I command you, observe to do it: thou shalt not add to it, nor diminish from it.
Romans 1:25 Who changed the truth of God into a lie, and worshipped and served the creature more than the Creator, who is blessed forever. Amen.