Just wanted to pass along something that many people are unaware of. I figured it out only after buying about 8 Billion impressions in a few short months 
Ok so here it is when you target USA guess what It is working only off the profile of the person and not the actual location of where they are at that time.
So If I am vactioning in Mexico I will still see the USA ads and local ads....
That would be all fine and well I guess except if you are not redirecting your traffic on your end and say direct linking it to an Affiliate Network most Affiliate networks block or redirect foreign traffic so the user even though they reside in the Usa, because of the current location will be blocked from seeing the offer and you just paid for a click that is useless. Think it's not a big deal? try up to 6% of all bought traffic this happens to. My advice: never direct link on FB always control your links with a redirect script and make sure on your end they get to see the offer.
Pm me if you have any additional ?'s on it I am happy to advise.
#strongpost
good stuff.. i assume you just have a simple geo redirect in place?
Nice Kevin, like to see when a network gives some good tips. I didn't need 8 billion impressions to figure that out though, my first vacation outside the US I noticed I still got US ads 
How about posting the geo redirect script without the PM?
From the network end yes.
As a network the script we use is part of our tracking software so no way to post that
On the buyer end I just use tracking202 and control it from there.
wait how do you control geo redirects from tracking202?? am i missing something you'd need a seperate script i thought.
Yeah again I get to cheat becaue I own a network and use the scripts on link trust for my internal buys. I will find out what my other buyers are using.
Nice tip Kevin; I wonder if it has something to do with FB tracking computer MAC address / other computer fingerprinting info.
Great tip dude! It adds up for sure. Would be interesting to see the increase of redirected traffic during holiday seasons.
@xy7kevin
Good share man. When doing volume 6% does make a change.
@The Angry Russian
If you have GeoIP installed on your server use this :
[PHP]
$ip=trim($_SERVER['REMOTE_ADDR']);
$co=geoip_country_code_by_name ($ip);
if($co!="US"){
header("Location: http://uslink.com");
if($co!="CA"){
header("Location: http://calink.com");
if($co!="UK"){
header("Location: http://uklink.com");
[/PHP]
Can add as many if conditions as you want to add more countries.
Good point. I will start notating it.
Great tip.
I just saw Neverblue has a handy tool to redirect per country. I have never used it. I guess it is time to set it up as a backup.
Let me add to that i think when creating the account is when your given that footprint so if i was to create a US account from a UK ip i still see UK ads regardless if its a US account.
Can only assume they take IP into it and stamp you with it when creating the account. This is from my findings
In my opinion I don't think a redirect of offer would help much in this situation...
For instance, if your ads is about a game offer, a particular user clicks it because they want the game. When the user clicks it, they would get redirect to, let's say, a mobile offer because there is no game offer available for that particular country the user is browsing on... The user would be sent to something else, this kills their initial purpose of clicking the ads...
Anyway we can deal with this together with the geoIP script?
Redirecting is tough but at least you are getting something for that click...