XML sitemaps are crucial for Magento SEO as they provide search engines with a clear structure of the website's content. This helps search engines understand the website's hierarchy and ensure that all pages are properly indexed. Additionally, XML sitemaps make it easy for search engines to crawl the website, reducing their workload and improving the overall SEO performance. With Magento, XML sitemaps are automatically generated and updated, making it easier for webmasters to optimize their websites for search engines. Overall, XML sitemaps are an essential component of Magento SEO and can significantly improve website visibility and rankings.