If you have an international website you absolutely should have hreflang tags implemented.

When you have a website, like Apple, for example, that has country folders in the URL, you want the appropriate country URL to appear in the appropriate country where the search takes place.

Listen to this podcast to get an overview of hreflangs and consider implementing it on your website.

Have an International Website? You Should Have Hreflang Tags Implemented: Part 1 episode transcript.