If you think about SEO as a holistic approach to delivering the best search results for readers, then the use of outbound links in SEO is obvious. It is to do with adding value to the reader experience, offering good quality outbound links to further useful reading.
Credibility
Outbound links can enhance the credibility and relevance of your content. When you link to authoritative and reputable sources, it signals to search engines that your content is well-researched and supported by reliable information.
This can positively impact your own site's credibility and trustworthiness.
Above and beyond
Outbound links can offer additional value to your readers by directing them to more in-depth resources, further reading, or related content. This improves user experience and increases the likelihood of visitors spending more time on your site, which can lower bounce rates and boost rankings.
Avoid redundant information
Instead of trying to cover every aspect of a topic on your own, outbound links allow you to refer users to established resources. This prevents content bloat and ensures that your readers have access to the best and most relevant information available.
Adding good quality links naturally throughout your content where appropriate will only add value.
