WHAT IS DNS PROPAGATION?
DNS propagation can relate to two things; updating information regarding changes to your DNS zone, or changes to your WHOIS information.
Changes to your DNS zone is usually quicker as it only affects a small number of servers. Your WHOIS information is more complicated to change as it is a global record of your domain available to every DNS server in the world.
Changes to WHOIS could take up to 72 hours. Domains may not be visible for up to 48 hours after ordering or transfer between providers as DNS servers around the world need to be updated.