Technically, the .tv domain extension is a country-based TLD for websites based in Tuvalu (a tiny island nation in the Pacific Ocean). However, the domain is used by tv-related websites around the world.
You should only use this domain if your website or business is about the TV industry. Using it for other businesses or blogs would look odd.
Even if you have a tv related website, we recommend you use a .com domain name instead. Many popular tv companies don’t use a .tv domain extension. For example, HBO, CNN, CBS, and dozens more.