I want to know what the URL that consists only of numbers means

This is an IP domain name. Each website has a corresponding IP domain name. In fact, you can also log in to the corresponding website using an IP domain name, but ordinary people usually enter the website address directly instead of the IP domain name. , so this is not well known!

Of course we can enter a domain name to enter a website. The DNS server (domain name resolution server) resolves common domain names into IP addresses. It is easy for you to remember. In other words, the DNS domain name resolution server is used to help us complete the address. The main purpose of conversion work is to facilitate memory.

Of course we can also use the IP address to enter, but it is customary for us to use the domain name, after all, it is easy to remember.