Every device connected to the internet has a unique numerical Internet Protocol (IP) address such as 123.45.678.901. Since lP addresses would be impossible for nearly all of us to remember, we can also access internet sites by using domain names such as murmuration.org instead of their IP addresses. The Domain Name System (DNS) makes this possible.
When you are trying to get to a website with your computer's browser (for example, Apple Safari, Mozilla Firefox, Google Chrome, or Microsoft Edge), you type in the domain name, and the browser connects to a DNS server. That DNS server looks for the domain name in its database. If the DNS server finds that name, it will also have its associated IP address, which it returns to your browser. If it does not find that name, it will query other DNS servers until it finds the IP address associated with the domain name.
Once your browser receives the IP address from the DNS server, it can connect to the website's server and request the webpage you want to view. If everything works correctly, your browser will then display that page.
The DNS system is hierarchical, with multiple levels of servers. Various organizations around the world maintain the top-level DNS servers (also called root servers). These servers contain information about the top-level domain names such as those ending in .com, .net, .org, and .edu.
Below the top-level DNS servers, there are authoritative DNS servers that are responsible for specific domain names such asorganizer.com). These servers store information about the IP addresses associated with the domain names for which they are authoritative.
Finally, there are local DNS servers, which are typically maintained by your internet service provider or organization such as Comcast or Cox or Spectrum. These servers store information about frequently accessed domain names to reduce the time it takes to access domains and reduce the load on higher-level DNS servers.
In Organizer, you may need to set up either a landing page domain and/or an email domain. Instructions for these processes are described in two other documents: Landing Pages, and Email Domains.