"Normal analysis: The default mode works as a normal analysis board. It can be used for many different things, but is primarily used for game analysis.
Practice with computer: This mode removes the move list and lets you play the starting position against the engine. It can be used for puzzles or endgame training.
Hide next moves: This mode is similar to normal analysis, but moves after the current position are hidden from viewers of the study. This is mostly useful for coaches who want to analyze and play "guess the move" with a student.
Interactive lesson: This interactive mode allows you to guide the study viewer (player) through a game, variation or puzzle by giving them instructions, hints, and feedback when they play the right or wrong moves."
lichess.org/blog/WtDErSQAADJfhJJs/interactive-lessons