Internal and external links play vital roles in SEO content. Internal links connect different pages within your website, improving navigation for users and helping search engines understand the structure and hierarchy of your content. They also distribute link equity throughout your site, potentially boosting the ranking of linked pages. External links, on the other hand, provide additional resources and references for your readers, increasing the credibility and relevance of your content. Search engines also consider the quality and relevance of external links when determining the authority and value of your content.