Secure Sockets Layer (SSL) ensures your website is secure for your website visitors. You’ll notice that your URL will have HTTPS in front of it, and most browsers will display a secure website by using a padlock symbol. If you plan to capture personal details or data from your website visitors, or sell products/services online and take payments details, an SSL certificate is essential.
Most search engines like Google will penalise your website for not having HTTPS, so it’s recommended to have one even if you don’t capture customer details. Many web hosts offer SSL certificates for free as part of their hosting package.