They are groups of letters given a special purpose which is to inform the user about the region or country the website is based in. They are a part of the website’s URL and generally referred to as ‘country-code’ TLDs. A few examples are for Google UK and for any website based in Australia. They can either be sets of two letters each or even be two sets of letters with a period in between, such as in the case of Using CCTLDs correctly can prove to be a big boost for search engine optimization as it allows developers to target their content as per the country involved. Although having said that, there are designated subdirectories or country-focused subdomains which can be used to target foreign countries.