An SSL certificate is a digital certificate that secures the connection between a website and its visitors. It encrypts data such as login details, credit card numbers, and personal information so that it cannot be intercepted by hackers. When a website has an SSL certificate, the address bar shows a padlock icon and uses HTTPS instead of HTTP.

Without an SSL certificate, visitors may see a “Not Secure” warning in their browser, which can reduce trust and credibility. SSL is essential for any website that handles customer data, logins, or payments.