This post is designed to be short and sweet. I don't want to nerd out too much on the subject of website security. If you're interested in the nerd out version on HTTPS and how you can secure your website, you can read that here. The simple version of website security comes down to HTTPS & HTTP. HTTPS is the the reason why your website says "Secure" and HTTP is the reason why your website says "Not Secure" in the address bar.
Https encrypts the flow of information from your website visitors and your website. This is important If you have a contact form on your website where people fill it out with their name, email, and phone number. That information is at risk of being intercepted if your website is not secure with HTTPS.
With HTTP that same information is not encrypted as it flows between websites and can be easily intercepted and read. Without the encryption from HTTPS, that information is being sent in plain text.
We put together this infographic to help you get a better understanding of the difference between HTTPS and HTTP.