Country code top-level domains also known as ccTLDs are a top-level domain is the suffix that appears at the end of a domain name, and a country code top-level domain is one that’s typically reserved for a particular country. They’re important in SEO because they are the most definitive way to tell a search engine that your website content is made for people living in a certain country or region. Note that the ccTLD does not communicate language. You can find a list of ccTLDs here.