When small "s" changes everything: HTTP vs HTTPS

HTTP stands for Hyper Text Transfer Protocol. And what is "s"? It stands for Secure.

The HTTP protocol is used to send the website content. A site is stored somewhere on the server on the internet. If you type that site name in your browser, a server needs to send requested website page somehow. That is done using HTTP. Your browser will receive data and show you requested webpage. Moreover, if the page has any active elements where you can type your name or password, it would be sent back to the server using the same HTTP protocol.

HTTP was developed decades ago when no one thought about security. HTTP transmits all data in plain text. That means you tell everyone in the world any data you type on an HTTP page: Password, Bankcard, Telephone number, Message body and so on. That is the same as standing in the overcrowded train car and yelling out loud all messages you receive on the phone. Is that something you want to share with everyone?

HTTPS did the same, but it encrypts data link. That means no one can see what the server sends you and what you sends to the server. That is a standard in today's world.

HTTP sites are still make up 50% of all websites. Look for the small lock in the address bar or for https at the begging of the web page address.