DNS propagation is the process where updated DNS information spreads across the internet's global network of servers. When you change your domain's nameservers or DNS records (like A, CNAME, or MX records), these changes don't take effect instantly worldwide. The delay occurs because internet service providers (ISPs) and DNS resolvers around the world cache (temporarily store) the old DNS data to improve website loading speeds and reduce server load.

The typical propagation time ranges from a few minutes to 48 hours. However, most updates complete within 4 to 24 hours. Several key factors influence this duration:

• TTL (Time to Live): This value, set in your DNS records (in seconds), tells other servers how long to cache the information. A lower TTL (e.g., 300 seconds) before making changes can speed up propagation.
• Your ISP: Some providers refresh their DNS caches less frequently.
• Geographic Location: Changes may appear faster in regions closer to your hosting server.

You can check propagation status using free online tools that query DNS servers globally. Important: During propagation, some visitors might see the old site while others see the new one. This is normal. To minimize disruption, plan DNS changes during low-traffic periods and consider lowering your TTL values a day or two in advance.