Question about GZIP in forum

[pri2sh]

I have one small forum ( mybb powered )

and mybb offer a feature called gzip it is said in description that it will help in board optimization for faster loading and help save bandwith.. Since i am in free server i am confused weather to use this or not as free server won't allow stuffs that use high resources. Will using gzip increase the load on server? and there is 9 levels of gzip.. currently i am using level 4

[ccl0]

i've never heard of gzip until reading this. but then again i don't have my own site

looks like a little info on it http://en.wikipedia.org/wiki/Gzip