Bootstrap 4. Positioning content inside blocks, how to do it right?

Question

Bootstrap

I finally decided to master bootstrap 4 and ran into such a problem, are there any special classes for positioning content inside blocks, for example, you need to center the text inside the blocks, h ttp://prntscr.com/lgqr6b and on right-aligned phone, are there any bootstrap classes for this? I didn't find it in the documentation
Thank you!