A mobile visitor should be able to understand the service, explore the relevant information and contact the business without struggling with the layout. Clear headings, readable text and usable menus support those tasks.
Consider long menu labels, form validation, image dimensions and touch targets. A desktop layout should adapt rather than simply shrink. Test enquiry actions and page content on the devices that matter to your audience.
List important visitor tasks and check how each supports the business goal. Use accurate content and real journeys rather than judging visual decoration alone.
Identify who approves information, supplies licensed media and maintains content. Confirm domain, hosting and external account ownership so future updates have a clear contact.