The Trinity means that God the Father Jehovah, God the Son Jesus, and God the Holy Spirit are one God, not separate entities.
God appeared as the Savior in a different form with a different name in each age but the Triune God is the same in substance.

Isa 9:6 for to us a child is born to us a son is given and He will be called mighty God everlasting Father

The bible testifies that Jesus who was born as a baby is mighty God Jehovah in other words, God the Father Jehovah and God the Son Jesus are one and the same.

No one knows the thoughts of a man except the man's spirit even so no one knows the thoughts of God almighty except the Spirit of God.
the Bible testifies that the Holy Spirit searches all things even the deep things of God. (1Co 2:10,11)

So, God the Father Jehovah, and God the Holy Spirit are one and the same.

The Bible also testifies that the Holy Spirit is the counselor but the counselor the Holy Spirit whom the Father will send in my name will teach you all things. This proves that Jesus and the Holy Spirit are one and the same. (Jn 14:26, 1Jn 2:1)

Therefore, the Bible teaches us that God the Father Jehovah, God the Son Jesus, and God the Holy Spirit are one and the same.

The thing is that the one God appeared in a different form with a different name for the work of salvation in each age.

If you believe in the Trinity, you will realize that God the Father Jehovah, God the Son Jesus, and God the Holy Spirit Ahnsahnghong are the same God with no distinction in work.