Frontend

1. check all frontend pages
   1. check content for old company names, demo content, etc
   2. check all links, etc
2. mobile responsive, alignments, spacing, lineheights, etc
3. check contact information is correct

Backend

1. adjust all plugin licences to new domain
2. deactivate licences on staging urls
3. address all the notices in the dashboard
4. add Google Site Kit and connect GA

Report & Reflection

1. Site speed test/ Google Console speed test
2. Google Search test
3. Report