Go to FB, then your profile, then click the three dots to the right the blue button that says “add story”, then view privacy short cuts, then scroll way down to Ad Preferences, then click on “see your ad settings”, then “data about your activity from partners”, then scroll down just a little bit and you will see a slider bar that says “use data from partners”
THEN....
Click on that fucker! The slider will turn from blue to white to show you that it turned it off
Like I said, it’s not very intuitive on how to find it or get there to turn off this damn thing