Basically this plugin will increase conversions by Geo Targeting content towards your users. It gives a more personal a local targeting call to action.
For example, you could have a promotion targeting just for US visitors titled "Welcome US customers, Here is your special offer today"
Since poker is now legal in some US states, you can also target visitors of just those states with different content and promotions.
Perhaps you have an Amazon affiliate site and you want to show different pricing per a visitor's location. So you could show a default price for US customers and different price shown for Canadian customers using this plugin.