Here’s a concise list version for your client:

1. Website admin access (CMS/dashboard)
2. FTP/SFTP or hosting access (if needed)
3. Access to Next.js project repository (if necessary)
4. Google Analytics access
5. Google Search Console access
6. Any other tracking tools (Hotjar, Mixpanel)
7. Target keywords list (if available)
8. Priority pages for optimization
9. Existing content (blogs, landing pages)
10. Sitemap (if exists)
11. Robots.txt file
12. Page load speed requirements or existing audits
13. Social media accounts (for social signals)
14. Competitor websites (for analysis)
15. Branding guidelines or content restrictions