This description is subject to the type of rod you may be talking about at the time.
Moderate fast action rod.
Action balances the power of the rod for casting and fighting bass.
The moderate fast action is an advantageous choice for presenting moving baits but when spooling up with 40 or 50 pound braided line the moderate fast action can become suitable for casting plastics and jigs.
Sometimes slow action rods are termed parabolic meaning the bend of the rod is similar throughout the length.
Rod actions this describes where the rod bends when pressure or weight is applied to the rod.
The action of a rod is determined by where a rod flexes along the blank.
A moderate or medium action rod is very versatile.
Slower action rods flex down into the butt section.
Improved line control and accuracy over fast action.
I am looking at a fenwick hmg 7 medium heavy rod with a moderate fast action.
Suited to widest range of fishing conditions great versatile rod choice for beginners.
A fast action fly rod or steelhead rod will bend much lower and more easily than a fast action.
During casting a moderate action rod will bend moderately for half of its length and the lower half will remain stiff.
Presentations and techniques that benefit from fast action rods are jigs texas rigged and carolina rigged worms.
Moderate action bends at the 30 40 mark and slow action bends at 50 or below.
A fast action rod will bend in only the top third or less of the blank a medium or moderate action will bend in the top half or so and a slow action will bend starting in the lower third of the rod.
I originally wanted a fast action but fenwick did not have one in that model.
Fast action is popular because it provides sensitivity for monitoring bites and can quickly load up for hook setting.
I use most all baits but probably use soft plastics such as worms and lizards the most.
I recommend fast action for all beginners and anyone trying out a handful of different techniques or targeting different species.
Faster action rods flex mostly near the tip.
The rod s action influences how it casts how sensitive the tip is and the rate at which it transfers the hook set to the bait at the end of the line.
Because of the additional rod flex energy distribution and forgiveness this is one of the most versatile bass rods you can own.
The moderate to slow action blanks are usually good for multi hook treble lures such as crank baits rattle baits and jerk baits.
More forgiving than a fast action rod a moderate action rod is somewhat flexible but also offers a good degree of stiffness.
A moderate fast or light action will bend nearly a third of the way down the rod blank which is considered slow.
A fast action rod will bend in the top third or less of the blank a medium or moderate action rod will bend in the top half or so and a slow action rod will bend starting in the lower third of the rod and into the handle.
