There are many differences between digital and analog. Let me explain briefly: Suppose you give a friend a piece of news or information. Now , you go to him and give him your news. This is analog. And without going to him, he called and informed you about the news or information within minutes. It's digital. For example, sending a letter a few years ago would take days or months. That time was the analog era. Now we can digitally send mail in a few seconds. This is digital.