How to prevent AI crawlers from scraping duplicate content and causing index redundancy?

When a website has duplicate content, AI crawlers may crawl identical or highly similar pages, leading to redundant search engine indexing, which affects content weight and user experience. To prevent this issue, systematic handling from both content management and technical configuration aspects is required. Technical configuration: Standardize canonical URL settings, specify the preferred version in duplicate pages through tags to guide AI crawlers to prioritize indexing authoritative pages; configure the robots.txt file to set disallow rules for valueless duplicate pages (such as print pages and session ID pages) to limit the crawling scope. Content optimization: Ensure that similar pages have substantial differences in titles, meta descriptions, and core body paragraphs to avoid AI identifying them as duplicate content; manage dynamic parameters, and for URLs with filtering and sorting parameters, merge similar page indexes through search engine tools (such as Google Search Console parameter management). It is recommended to regularly use content similarity detection tools to check for duplicate content and monitor indexing status through the search engine console, adjusting optimization strategies in a timely manner to reduce the impact of redundant indexing on website visibility.