Modifications to minecraft and which are bannable for !

yesterday i found a mod for minecraft not searching for cheats or exploits in any way , but rather to prevent lag

i came across a mod named optifine and installed it , i thought i would ask here if its alright to use it

all it does is adds more to the video settings like grass water lava cloud quality etc turn rain down so u only see the droplets

there is heeps of settings to prevent lag (and quality lol )
i am assuming this type of mod is acceptable but i am also putting this here for the noobs that might not know

- Snowgolem1

SnowGolem1 wrote:yesterday i found a mod for minecraft not searching for cheats or exploits in any way , but rather to prevent lag

i came across a mod named optifine and installed it , i thought i would ask here if its alright to use it

all it does is adds more to the video settings like grass water lava cloud quality etc turn rain down so u only see the droplets

there is heeps of settings to prevent lag (and quality lol )
i am assuming this type of mod is acceptable but i am also putting this here for the noobs that might not know

- Snowgolem1

Where can i download it, i lagg terribly.

by no mods allowed, he means no "hack" mods, e.g. Fly, invincible, invisible, jump, speed and all those ones that are like that, OptiFine is mod is more like a, texture pack if you would say but with greater detail then just different looks, it gives you the ability to help the game suit your computer, or to increase the detail for minecraft for people with top computers.