DNS changes are not always instant, so a site or email service can appear inconsistent during a move.
- DNS propagation is the time it takes for updated DNS records to be seen across different networks and resolvers.
- Some visitors may reach the new server while others still reach the old server for a period of time.
- Avoid making repeated DNS changes during propagation because it can make troubleshooting harder.
- When moving hosting, keep the old service active until the website, email, SSL, and forms have been tested on the new service.
