URL rewriting and redirection allow you to customize and manage the URLs of your application. In ASP.NET Core, you can use the URL Rewriting middleware to define rules for rewriting or redirecting URLs. The middleware matches incoming requests against defined patterns and applies the specified transformations. You can rewrite URLs to map them to specific routes or controllers, or redirect URLs to different locations or with different HTTP status codes. This can be useful for implementing friendly URLs or handling URL changes.