Pro Jigging Reels:What,How and Why?
Jigging Reels are for Jigging, so if you exactly know what jigging is, then you know what jigging reel is. Jigging is the practice of fishing with a jig. Jigs are intended to create a jerky, vertical motion, as opposed to spinnerbaits which move through the water horizontally. Most fish caught by jigs are on or near the bottom. So you may hear of Vertical Jigging or Bottom Jigging, that's the source. Jigging Reel is a kind of fishing reel used to jigging which is up and down your jigs. Jigging Reel is a reel with high gear ratio about 5.0:1 or much higer, a powerful handle and a strong spool. A high gear ratio 5.0:1 allows you turn the handle once to have the spool turn 5 times to reel in faster. The strong spool provides stability even under heavy load, a powerful handle provides great cranking power to lift stubborn and strong fish out of the depths. Vertical Jigging or Bottom Jigging you have to avoid your Jigs hook the bottom rock or seaweed when you try to attract bottom fish, reef fish or rockfish.
The Jigging Reels could be classified into two ranges. Light Jigging Reels and Pro Jigging Reels.
Light Jigging Reels
Spinning Reels can do the Jigging work, Shimano Jigging and Spinning Reel is of this kind. Fixed Spool Reels are usually used for freshwater bottom jigging. Fish under 10KGs would be the choice.

Shimano Navi 8000 Light Jigging Reel
Pro Jigging Reels (Why Pro Jigging Reel?)
Besides the Light Jigging Reel, Pro Jigging Reel is a fishing reel like the trolling style reel, the choice of Pro Jigger both for freshwater fishing and saltwater fishing whether normal game fish or Big Game Fish. So Pro Jigging Reels are for all weather Jigging job. Usually Pro Jigging Reels are Dual Drag and Two Speed, so you can use Pro Jigging Reels do a trolling reel work or a job of a multiplier reel when necessary.

Shimano Pro Jigging Reel