HTTPS is a way to encrypt information that you send between a browser and a web server. This protects your website’s users from “man-in-the-middle” attacks, where someone steals the information being sent to a website, like credit card information, logins, etc. An SSL Certificate (Secure Sockets Layer) is a set of data files that you can add to your server to achieve this encrypted connection between a browser and your server. Besides securing your website by way of encryption, it also helps with SEO (Google Rankings). Google has confirmed that HTTPS is a ranking signal. An unsecured website risks users’ online safety and could be hurting your SEO efforts. Google confirmed in 2014 that HTTPS is now a ranking signal. So, if your site doesn’t have SSL certificates and is on HTTPS, then now would a good time to update.
The Google post above is also a good read on how to decide the kind of certificate you need: single, multi-domain, or wildcard certificate. Another bonus is that a SSL certificate increases customers trust (see my related past article here) and confidence in your website. Customer confidence is essential to increasing conversion rates.