There are a number of topics that can be difficult to convey to a client and propagation is most definitely one of them! Propagation is “the spreading of something” and in the case of web design, it refers to the time it takes for DNS (domain name server) changes to fully resolve. This can occur when a website is first launched or moved from one host to the other. Anytime you are changing DNS, you and your client need to wait for those changes to move through the internet.
After entering a URL, the visitor can see how the site is rendering across the globe.
Do you have trouble explaining the concept of propagation to your clients? I hope this helps if you do. Do you use a different tool for this purpose? If so, please share!
RESOURCES: HowStuffWorks – How Domain Name Servers Work