Need Clarity About ABA Therapy

I was trying to learn about ABA therapy. It’s for my son. He’s autistic. He was diagnosed with autism spectrum disorder last week. Honestly, I’m not that worried. I know that there are solutions to this problem and one day my son would be able to live a happy life. I just really love my son. He’s a great kid. You wouldn’t know he is autistic unless someone told you. He is that smart when compared to other kids with autism. I want to give him the best treatment out there.
As I was learning about the available treatments I found out that ABA therapy is the most recommended mode of treatment. But I wanted to get some more clarity. Are there more than one ABA therapy techniques? What are these ‘consequences’ they talk about? I saw some articles online but none of them were clear enough about these details.