WordPress speed and security checklist
yasirnajeep.com/en/resources/wordpress-speed-security-checklist/

Safe baseline
[ ] Take a backup and test restoration outside the same server.
[ ] Update WordPress, the theme, and plugins in staging first.
[ ] Remove unused components and review administrator access.

Performance diagnosis
[ ] Compare server response before and after caching.
[ ] Inspect queries, autoloaded options, scheduled jobs, and media.
[ ] Isolate theme and plugin cost in staging.

Monitoring and recovery
[ ] Enable error logs, uptime monitoring, and failure alerts.
[ ] Document DNS, hosting, backups, and the restore owner.
[ ] Test the recovery plan regularly.