How do I change my published URL (website address)?

You have two options: (1) Lovable subdomain—click Publish and select a new lovable.app subdomain (subject to availability). (2) Custom domain—requires a paid plan. Use Automatic setup (select DNS provider) or Manual DNS (Lovable provides the A record pointing to its IP). DNS propagation takes up to 72 hours, usually faster. Let's Encrypt provides free SSL/TLS.