Each Geo Popup service you create will come with its own JavaScript code.
This piece of JavaScript code needs to be placed in your Magento's website footer.
Steps:
On the Admin menu, select System > Configuration
In the panel on the left, under General, select Design
Paste the JavaScript code provided into the Miscellaneous Scripts box
Ensure the code is pasted at the start of the box before any other scripts so it is the first to process
Click on Save Config