Bhāvanākrama is a big and fancy word that means a plan for practicing meditation.
Just like how you make a plan to play a game or go on a picnic, people who do meditation also make a plan for how they want to do it.
This plan helps them to stay focused and know what to do during their meditation practice.
It's like a little guide that tells them what kind of meditation to do, how long to do it for, and how to do it in the right way.
This plan helps them to get better at meditating and become more calm and peaceful.
It's like a map that shows them the path to get to the peaceful land of meditation.