What are some of the basic things you consider while building a website ?

I will go first 0. User research and feedback 1. Clear value prop above the fold on the brand page 2. Clear call to action where required 3. Optimised css, JavaScript 4. Optimised images and a cdn 5. Right keywords for seo 6. Page speed observability 7. HTTP status code monitoring 8. Front end Exception and error monitoring What am I missing ?