A Secure Sockets Layer (SSL) certificate is like a digital ID for a website. They assure visitors that the website they are visiting is genuine and not a scammer trying to steal information. But here's the kicker: These certificates are not valid forever. It has an expiration date. That's actually a good thing. Just like you need to renew your driver's license, you need to renew your SSL certificate regularly to stay secure and up-to-date with encryption standards. When a certificate expires, browsers like Chrome and Firefox warn users that the site is not secure. It doesn't look good, does it?