The main difference between http:// and https:// is that it’s all about security HTTP stands for Hyper Text Transport Protocol which is just a fancy way of saying it’s a protocol (a language, in a manner of speaking) for information to be passed back and forth between web servers and clients.
The important thing is the letter ‘S’ which makes the difference between HTTPand HTTPS. The S (big surprise) stands for “Secure”. If you visit a website or webpage, and look at the address in the web browser, it will likely begin with the following: http://. This means that the website is talking to your browser using the regular ‘unsecured language. In other words, it is possible for someone to “eavesdrop”on your computer’s conversation with the website. If you fill out a form on the website, someone might see the information you send to that site. So, never, NEVER enter your credit card number in an ‘ http ‘ website!