Thanks to Jax's K/D/A and utility, he has a somewhat poor overall win rate. He does best in the late game, with a winrate of 50.8% in that phase. Unfortunately, he does terribly in the early game, where Jax's winrate is 46.6%., The difference between his best and worst game phases is about 4.2%. This large difference indicates that his power spikes and wanes in different phases of the match. Plan accordingly.
Jax has been used a lot in recent ranked League of Legends rounds. In the current meta, his popularity is 7.5%. A lot of players see him as a danger. He has been banned in about 11.9% of LoL matches.
Jax is played mostly in the top position. This happens in 79,1% of his rounds. Yet, top Jax has the highest win rate (48,9%) of all positions but is less popular of a position (played 17,9% of the time). Currently, Jax's meta game is centered around dealing damage. Specifically, his kit should mostly be centered around physical damage. Furthermore, he is an ok magical damage dealer champion. Supporting others and crowd control are the least important part of Jax’s build.
If you are not used to his skills and gameplay, you may find it difficult picking him up for the first time. Most competitors consider him to not be a challenging champion to master. Jax mostly does physical damage (59% of his total damage). He also deals a large amount of magic damage.
Jax deals a good amount of damage in a typical game (19.610 damage). You could focus on developing him as a damage dealing champion to defeat your enemies.
He is an average damage dealer on the Rift with 5.9 kills on average each game. That is one of the highest kill counts amongst all tops. Moreover, he has a fairly typical death total with an average of 6 deaths per League of Legends game. Furthermore, Jax's KDA is usually very low with an average KDA ratio of 1.7 as well as 4 assists per match.