Lag is not good. WOAH, THAT'S CRAZY! I know, right? Wanna know how to get rid of it on Java Edition?
Watch this video first:    • How Minecraft Works Ep. 7 - LAG  

Performance enhancing mods links (Be sure to research on your own to make downloading these mods are safe (although we think the virus may be gone)):
https://www.curseforge.com/minecraft/... (1.20.1+)
https://www.curseforge.com/minecraft/... (1.19.4)
4K ULTRA HD image credit Know Your Meme

Enjoy! Please watch more videos if you do!