The hands are you only contact point to the club so it seems obvious that they are a key area in the golfers body. However, grip strength is often ignored completely by golfers, or if trained, trained with ineffective methods.
Why Your Grip Strength Matters, and How to Improve It - The New York Times
Grip strength: Unlocking Your Grip Strength: Conquering Life's Challenges - FasterCapital
How To Improve Grip Strength Even If You Are No Ninja Master - BetterMe
Revolver Grips: Enhancing Comfort and Control - FasterCapital
GripXT™ - Grip Strengtheners ($1 Promotion)
6 Ways To Improve Your Grip Strength
How to Improve Grip Strength
How to scientifically and effectively improve grip strength? – FitBeast
Improve Your Grip Strength (with 6 Exercises)