A beautiful website should also be useful
Design, content and performance should work towards the same goal.
One question per page
Each page should help answer a question: what you offer, who it is for or how to get started. Write that answer first, then organise the content. Descriptive headings and real examples help more than a succession of generic promises.
Mobile is part of the design
Review text, navigation and forms on a small screen. A button should be easy to tap and a form should only request necessary information. Test keyboard navigation too: controls need a logical order and visible focus.
Publishing is the beginning
Check links, optimise images and give every service its own title and description. After publishing, notice the questions clients still ask. They often reveal missing content or sections that could be clearer.