HTTP / HTTPS - Difference between http and https.

Whenever You visit any website you see in URL Bar HTTP Mostly, But it suddenly change when you any other website such as Facebook or twitter to HTTPS.So what is the difference Between HTTP and HTTPS websites.

First you have to aware that HTTP Stands for Hyper Text Transport Protocol and the addition make it Hyper Text Protocol Secure.Its mean the communicating website is connecting to you in secure way so your data should not leak.The S secure your data from hackers, so we can say that it is Filter paper that seperate good guy and bad guy.
Mostly When you visit shopping , Paypal , Payza any social networking website such as Facebook and twitter then you will see HTTPS in your URL Bar.In shoping websites you will add your credit card number and other secret Information to their data.These website secure your Information in a secure way, 
So be aware !!! when you need to enter your Credit card in any website , first check above that HTTPS Shows or not.If Not then avoid from entering your Card so it can be hack.
So Hyper text transport protocol secure is indicated way for buying something.
If you have any Question About it kindly tell me in Below comment BOX.