A Stockfish line is a sequence of moves that the engine believes is best for both sides. It is extremely useful and frequently impractical. The skill is not reading the line; it is deciding what part of it applies to a human game.
Read the first three moves, then the idea
The first move is the engine's recommendation. The next two or three moves show the idea: a pawn break, a piece transfer, a king walk, a tactical resource. If you cannot state the idea in one sentence, click through more of the line until you can.
Compare plans with MultiPV
MultiPV shows several candidate moves with their evaluations. If the top two moves are within a few centipawns, the choice may be a matter of style or practical difficulty. If one line is much better, understand why the alternatives fail.
- Top move: a quiet improving move that keeps the advantage.
- Second move: a forcing line that leads to a draw.
- Third move: a practical try that gives the opponent a chance to go wrong.
The "best" move in a must-win game may not be the highest evaluation.
Check human practicality
Ask whether you could find the move under time pressure. A long forced line that requires memorising 12 moves is different from a natural developing move. The engine does not get tired, but you do.
Do not confuse the evaluation with the plan
A +1.00 position can be difficult to convert; a +0.20 position can be easier to play. The evaluation is a summary, not a difficulty rating. Look at the structure and the clock, not only the number.
Use the analysis board to compare lines at the same position, then play the position out against a bot to test whether the plan is practical.
See the whole game, not just the blunder.
Choose a review depth, see the maximum cost, and get move-by-move accuracy with blunder, mistake and inaccuracy markers.