Then what is free will? Care to explain? I can't really understand it.
I see the term "free will" as being synonymous with "will," the "free" being redundant and therefore superfluous. As defined in thefreedictionary.com "will" is
a. The mental faculty by which one deliberately chooses or decides upon a course of action:
In order for this definition to be meaningful the notion of
free must be an inherent part of the will's character.
As Wikipedia puts it, "free will," or just "will" if one prefers, is "
the apparent ability of agents to make choices free from certain kinds of constraints." Wikipedia then goes on to note that "
Historically, the constraint of dominant concern has been the metaphysical constraint of determinism."
Now, if there's some other concern of free willers I haven't seen it. Most often FWs simply claim "My choice was not determined. I could have done differently if I chose to," and leave the explanation at that.