Christians, what is baptism of the Holy Spirit?

Look. I LOVE GotQuestions for their answers to questions, but the answer to this question is probably inaccurate as I have been given different answers.

Quote from GotQuestions

The baptism of the Holy Spirit may be defined as that work whereby the Spirit of God places the believer into union with Christ and into union with other believers in the body of Christ at the moment of salvation.

Link to article: https://www.gotquestions.org/Spirit-baptism.html

Quote from my local pastor

Baptism of the Holy Spirit is when you behave like Christ, for instance, not listening to rock music being one of those behaviors.

Quote from A notary public/Paralegal

Baptism of the Holy Spirit is when you believe in God, and He takes you to His kingdom.

I don’t know the true answer. What exactly is the unbiased definition of “baptism of the Holy Spirit”?