Jiu Jitsu is a fighting style concentrating on ground fighting and entry holds, highlighting strategy over brute strength

https://grapplingbjj570.nexorafield.com/posts/what-makes-gracie-barra-different-insights-from-present-professionals-on-reddit

Jiu Jitsu is a martial art focusing on ground battling and submission holds, stressing method over brute strength. It educates professionals to utilize their body auto mechanics to resist larger challengers, making it available for people of all sizes.