Redirecting a web visitor based on his or her country is a great way to show localized versions of your website if you have special languages that you wish to display. You can also use it to show the most relevant content to your visitor as well. For example, if you had a page with US currency and then had a visitor from the UK, you could convert everything to pounds sterling for a friendlier user experience. Country-based redirection is also great for serving relevant advertisements and localized business offers. The possibilities are endless.
<head> tags in your HTML.