It can be said that "Path of Exile" leaves a lot of opportunities for new players to take the lead. You will see a lot of terms about POE Currency, POE sphere, POE trade, because the huge ARPG provides players with a wealth of customization options and so on. One of such features is gems, which may be difficult to adapt in the game, especially in terms of skill gems. However, this brief introduction to how to layer should help you understand how they are layered.
Descending to level A, you can still find some powerful gems in it, but they may require more investment than the upper level. Barrage is one of the lower investment and most popular options. If you are hovering or bowing your head, Barrage will generate a lot of POE currency when used correctly.
Then, you have Fire Trap, which is very useful for both your Path of Exile skills and experienced people, because it is a wonderful gem for improving your skills. If you are more focused on close to mid-range combat, Frost's Blade is a good choice.
Despite the lower level, you will find some of the gems here are actually very interesting. You can still expect a considerable amount of damage, although it is not that much compared to the other damages currently listed. You can get gems of skill level, such as sweeping, which is good for area cleaning and has good damage. You can also enjoy entertainment and balance options, such as Ice Shot, Lacerate is a good choice for close combat.
Skill gems found in layer C and higher are almost useless, or at least will cost you a lot of POE currency to invest. Here you can find "Blink", "Frozen Mine", "Explosion Trap", "Bear Trap", "Punch", "Viper Strike" and the like. In the long run, it will not bring you any benefits. In general, you'd better avoid and keep your PoE project and currency.
Now, POE Trade can have a deeper understanding of how to upgrade skill gems in Path of Exile. The simple difference between them is their efficiency, potential damage, and whether to pay for it. Make large investments to get results?