An SSL certificate encrypts the connection between your site and your visitors’ browser so hackers can’t steal personal information. SSL certificates can be cumbersome to install and can be expensive, but this situation is changing.
Let’s Encrypt is a new open source certificate authority that is backed by top companies including Automattic (the force behind WordPress), Facebook, Mozilla, Chrome, Cisco, and Sucuri. The aim of the project is to make installing SSL certificates automated and free for everyone.
wpmudev has everything you need to know about Let’s Encrypt SSL certificates and how to use them with WordPress right here.