How do I center text on the left/right

[parthshah]

I want the text itself to be centered even when it’s not in the center of the actual screen but idk how. My teacher taught us about margins but idk if that is the answer but either way it didn’t work for me unless I did it wrong. I’ve finished most of my website but I just wanted the text on the left and right to be centered and on the left and right side of the screen, but not aligned that way