Thanks to Sejuani's K/D/A and utility, she has a somewhat poor overall win rate. She does best in the mid game, with a winrate of 49.35% in that phase. Unfortunately, she does very poorly in the late game, where Sejuani's win rate is 43.9%., The difference between her best and worst game phases is about 5.5%. This sizeable difference indicates that her power spikes and fades in different parts of the game. Plan well.
In the current meta, Sejuani is somewhat popular. She has been selected in 3.2% of recently ranked matches. Hardly anyone sees her as a threat. She has only been banned in approximately 0.5% of League rounds.
You will see her most often laning in the jungle position. However, that is not the best position for her. The top win rate position for Sejuani is support (49%). At this time, Sejuani's meta game is centered around tanking. Specifically, her build should mostly be focused on protecting carries. Furthermore, she is an ok physical damage dealer champion. Dealing physical damage is the least important part of Sejuani’s gameplay.
You should expect to have to to dedicate only a little bit of time practicing and learning to master Sejuani. Many LoL gamers believe she is one of the simplest champion to main. Sejuani primarily does physical damage (51% of her total damage). She also deals a significant amount of magic damage.
Sejuani deals a good amount of damage in a normal game (13.877 damage). You could focus on building her as a damage dealing champion to defeat your enemies.
She is an average damage dealer in the game with 4.2 kills on average per game. That is one of the lowest kill counts among all jungles. Moreover, she has a somewhat typical death rate with an average of 4.9 deaths per League round. Moreover, Sejuani's KDA is typically very high with an average KDA ratio of 3.0 as well as 10.5 assists per round.