The hreflang tag is a must-have if you’re running a multilingual site. It basically gives search engines a heads-up on which language and regional version of a page to show to users. Sure, Google and friends can guess, but without hreflang, they often get it wrong-which can mess things up with duplicate content and give users a crappy experience. You can set it up in a few ways-through the HTML, HTTP headers, or even in your sitemap. At the end of the day, hreflang really shines when it’s part of a solid localized SEO strategy. It’s all about getting your content in front of the right eyes and keeping users happy, wherever they are.