The approach
Start with the right question.
Evaluate monofilament, fluorocarbon and braid for the job rather than declaring one universally best.
In practice
Make it useful on the water.
Record line type and diameter when comparing fishing outcomes.
Keep learning
Connect the dots.
Use this guide as a starting point, then compare it with the water you're fishing, the tackle you're using, and your own observations. Good fishing knowledge grows through real practice.