An SSL certificate confirms your website is secure to transfer encrypted information back and forth between your server and a person’s browser. It helps ensure that your information reaches the right server and that no one can intercept it.
You’ll usually have to pay a yearly fee to maintain your SSL certificate. You have three options while choosing an SSL certificate: domain validation, business validation, and extended validation. Google requires hence both business validation and extended validation in order to receive the green secure bard next to your site’s URL.