Some writing from me per rare's request.
Vertical jig works at two ways, up rising and down falling motion.
1. Speed jig is designed to create a zigzag-type motion in rising. Most jig is tail heavy by about 7:3 ratio ( 7 = tail weight and 3 = head weight). Jig has to be light as it has to move against gravity. Probably, 100 - 150g... As we all know, it demands physically... It is very good for mid-to-bottom water chasers like Bonito, Jacks, Tuna, because it scans many different depth, that increases the bite chance... I am sure all of you guys are familiar with this... About 150-200 ft wreck is very good. This type of jigging is very effective when there is no particular concentration of school as its striking area is very wide. But jigger can run out of gas quick... I use harness for this type of jigging, which makes big difference in terms of how long you can jig...
jig
2. Slow Pitch Jig is designed to create a jig motion in mainly falling but some rising. This slow pitch comes from Japan. It requires a special rod whose tip bending profile is designed to a particular range of jig weight. Rod tip pulls up jig slowly. It also requires high-ratio reel ( about 1 meter line retrieve per crank). Basically, quick crank of 1/4, 1/2, 1 reel handle bends the rod tip (and upper part of blank). And then the rod tip pulls up the jig slowly as it straightens by releasing bending. And repeat. This type of jigging can be very effective when there is high concentration of fish as jig stays biting zone very long time... I have seen this type of jigging out fish bait at anchor trip specially when there are lots of fish but they don't want to bite baits...Jig can get much quicker reaction.
However, there is a limit how the rod tip pulls up the jig as the braid line takes water resistance...Let's say if depth is more than 250 ft or there is a strong current at shallow water, jig won't be pulled up as the same speed as rod tip. Also, rod has to be designed specially for a certain range of jig weight ( some jigger carries many rods tuned for different weight). heavier jig can be used than speedy jig, that is a benefit when targeting bottom fish.
3. Long Fall jigging (we call it slow jigging). This method mainly uses falling action similar to traditional jigging. But during falling, by some quick pulling, slow jig can create very different motion unlike traditional buck tail or diamond jig. It makes lots creative motions like back flip, side kick, zigzag, longfall, etc. Most jigger has its own unique style... I can create back flip with 500g jig... It really activates predator's instinct (They have to bite when they see an injured fish). Long fall jiggers can feel the jig motion better than other style jiggers. They can tell if the jig is good or not for given situation... Typically, they prefer jig with long falling time. ( weight ratio is closed to 5:5. You can make jig falling with side spin for the entire falling time.) Biggest benefit of long fall jigging is the rod as it can handle slow pitch as well as speedy jig. Long fall jigging rod is designed to handle very wide range of jig weight ( easily 100 ~ 400g). SJ7 ( Shark and Cudaman) rod is designed to handle 80- 450g but I also jig 500g. It is comfortable for speedy up to 250g. It can do long fall jigging up to 500g weight. It can also do slow pitch jigging up to 150-300 g...
When we fish a real deep water like 500ft for nice bottom fish, sometime, it is more important to use jig that can maximize bottom time.
When you go jigging trip, we are ready to do all three style of jigging, depending on the situation. If captain says "there is a school @ 100 ft of water" while actual depth is 300ft, we do speed jigging. If cap says "ship wreck is coming", I would do slow jigging. If someone hooks up a fish and I think my jig is similar area, then I would do slow pitch jigging...
Some of this is my opinion and most of this is what I learned a lot from Herbert and others as well as I have a lengthy discussion with Shark guy ( A jigging and popping legend in Asia)
Hope this helps
