Yes, backlinking still works for SEO in 2021. Think of it as votes from another website that is telling Google that your content is credible and valuable. The more votes you have from other sites, your page ranking on search engines improve. Though a lot of people consider backlinking dead, Google still considers it as an important ranking factor. However, it is important to focus on quality backlinks from trusted and authoritative websites. It adds more weight to your content.