Building high-quality backlinks is one of the best techniques for off-page SEO. You should focus on getting links from reputable websites. A high-quality backlink improves your website's authority and trustworthiness. Reaching out to relevant blogs for guest posting can help you gain valuable backlinks. You should avoid low-quality links that can harm your site's reputation. One strong backlink from an authoritative site is often more valuable than many low-quality ones. You can also participate in industry discussions to naturally gain backlinks. Consistency in building high-quality backlinks over time will significantly improve your SEO results.