SSL stands for Secure Sockets Layer, and it is a security protocol that encrypts data that is sent between a user's browser and a web server. This encryption ensures that any sensitive information, such as credit card details, is transmitted securely and cannot be intercepted by unauthorized third parties. SSL is important for eCommerce websites because it helps to protect customer data and build trust with customers. When a website has an SSL certificate, it is indicated by a padlock icon in the address bar and an "https" prefix in the website address. This can help to reassure customers that their personal information is safe when making a purchase on your eCommerce website. It is essential to have an SSL certificate on your eCommerce website to protect your customers' sensitive information and avoid any potential security breaches.