To prevent specific types of web pages from being indexed by search engines, follow these best practices: Use the robots.txt file to disallow indexing for entire sections of your website or directories. On individual pages, utilize the meta robots tag to specify "noindex" or "nofollow" directives. Employ the X-Robots-Tag HTTP header to communicate indexing preferences, either at the server level or on specific pages. Password-protect pages that should be accessible only to authorized users. Implement canonical tags to indicate the preferred version of a page. Include only desired pages in your XML sitemap. Maintain a clean URL structure, and use "noindex" directives in robots meta headers for dynamic or user-generated content. For pages you want completely removed from search results, return 404 or 410 HTTP status codes. Regularly monitor indexed pages using tools like Google Search Console to ensure compliance with your indexing preferences while considering the potential impact on SEO and user experience.