No, updating content does not hurt SEO. Actually, going back and updating old content can actually help with SEO. This is something really helpful to do with old blog posts if they are still relevant. When you do a basic search, you may notice the top results have been published with the past year or so. But the changes have to be more than just a few tweaks and switching out words. You want to add a new section of content to make sure that you’re adding new value to the page. You can also add updates to increase your page accuracy, link to better sources, and add media like videos and images. When you republish a page, this tells Google that you’re keeping your site updated and adding value.
