An online lifestyle magazine is implementing both basic and advanced technical SEO strategies. Evaluate the following actions and identify which are specifically relevant to enhancing technical SEO:
- Action I: Incorporating a Content Delivery Network (CDN) to ensure faster loading of high-resolution images across the site.
- Action II: Redesigning the website layout to make it more visually appealing and engaging for readers.
- Action III: Using schema markup to provide detailed information to search engines about the articles and authors.
- Action IV: Regularly updating articles to keep the content fresh and engaging for returning visitors.
Determine which actions directly contribute to improving the site's technical SEO.