What element is crucial for URL rewriting in SEO?

Search-friendly formatting is crucial for URL rewriting in SEO because it enhances the clarity and relevance of URLs, making them more meaningful to both search engines and users. Well-structured URLs that include relevant keywords can significantly improve a website's visibility in search engine results.

URLs that are clear and descriptive help search engines understand the content of a webpage and its relevance to a user's search query. This not only improves the chances of ranking higher in search results but also increases the likelihood that users will click on the link, as search-friendly URLs tend to be more appealing and trustworthy.

In contrast, aspects like user login management, multimedia integration, and content duplication do not directly contribute to the effectiveness of URL rewriting for improving SEO. User login management pertains more to website access and security. Multimedia integration enhances user experience but does not affect URL structure. Content duplication can have negative implications for SEO, as it may confuse search engines and dilute the ranking of pages with similar content.