what is this experience thing about..? like what do the levels mean and how do you raise your activity
Well... I see it like a nice game, this all things are made for cheer you up to be participative in the forum, make friends, make threads, add tags, help other users, be active be part of the community and in change you will receive deferents awards.
How increase your activity?.... Be part of the community, talk with other users, make spam, show them you are here.
also i read a but about this in the faq but i dun rlly understand the reputation thing?
The reputation?.... It's simple, if other user likes what you write they will give you positive points and viceverse.
The reputation issue is probably the most volatile thing in the forum, it all depends of the opinions or point of view of the users, it's as the "i like" bottom on Facebook or Youtube.
How to get them is your decision, be active and nice or not so active but make quality posts.
Well... it all is base in my opinions, people may have a deferent point of view.
Greetings!.