DNS propagation is the time frame it takes for DNS changes to be updated across the Internet. A change to a DNS record—for example, changing the IP address defined for a specific hostname—can take up to 72 hours to propagate worldwide, although it typically takes a few mints. For many modern use cases, these DNS propagation times are inconvenient, or simply unacceptable.
You can check the DNS propagation here: https://intodns.com/ & https://www.whatsmydns.net by entering your domain name. (example.com)
Please must clear the cache or try from some other browser and restart your internet before checking your website after few hours.