In computer technology, a dot separates parts of web addresses and file names.

When you type a website like www.example.com, the dots separate different parts: 'www' stands for the web service, 'example' is the domain name, and 'com' is the top-level domain. Similarly, in file names like 'photo.jpg', the dot separates the file name from the file type, telling the computer how to open it. This small mark helps computers organize and find information quickly and correctly. Without these dots, computers and the internet would be much harder to use.