We are using re-targeting using Adroll (though other providers are also there). If you are on http://visualwebsiteoptimizer.com/ http://visualwebsiteoptimizer.c

We are using re-targeting using Adroll (though other providers are also there). If you are on http://visualwebsiteoptimizer.com/ http://visualwebsiteoptimizer.com/ they drop a cookie and then identify you as you travel on different sites on web. They bid across ad networks to show you the ad of VWO. It costs approximately $1 per click and is perhaps the best investment you can make. But you have to be careful not to spook your users. Have a cap on how many times a person can see that ad in a day. It converts OK but is great from branding point of view. People tend to remember VWO because they have been on site before.