I need help Mods or knows stuff

Ok, I got optifine and downloaded it and I tried to run it but it said what do u want to use and I didny know. so do u know and file opener so I can open a .jar and run it please I need it for this computer<<<<<!!!!!

 

All you need to do is to drag the jar folder into 'versions' of mine craft.

 

ok I will check if that will work

 

it did not work