What is my vB 'salt'?

[b6gm6n]

Hi..

I have a mod where by the creator has included something called "vbulletin_salt" - it has the value "wtw4834747" (example) something like that (saying do not edit unless you have done so in your vB config) and i wondered if this was my vB cookie prefix or my vB license number, you see i bought a mod/bridge for some video soft which uses my existing vB database for users, you login via one and your logged into vB and visa-versa etc... so what do you think? i cannot see anything like this in my vB config and it might explain why I'm having some problems logging in & out of my video soft - please advise me, cheers