Literally millions of people subscribe to Google's Public DNS servers of 18.104.22.168 and 22.214.171.124. Suppose you have just made changes to your domain DNS records on your Authoritive DNS Servers and you want to get the propagation to go though quickly. Unless you have set your TTL (Time to Live) down to a low number like 5 minutes, it could take a day or more to propagate.
If you flush the cache on Google's Public DNS servers, propagation will happen much quicker. By flushing Google's Cache means that they will have to make a request on the authoritive Name Servers for your Domain. Google gives you the ability to flush the cache on their server for your domain.
This is the Link : Flush Google Public DNS
Google has other tools you may be interested in using such as
The can all be found at Googles G Suite Toolbox
Ron has been a network administrator since the 1994 and has worked extensively with Microsoft, LINUX and FreeBSD products. He has also owned and operated a successful ISP business and has consulted to many companies offering network security services and management.
Whether you have a network in your home or business, you need to make sure that it is secure and can be accessed remotely. It is essential that you have a complete look at your network from both internally and externally. We are all about Network Security!