SSL Certificate: What It Is and Why Your Website Needs One

What is SSL?

SSL (Secure Sockets Layer, or more accurately nowadays, TLS) is a protocol that encrypts the data exchange between a visitor's browser and the server. When a user enters a password or a credit card number, a third party cannot intercept or view it.

How to tell if a site uses SSL?

• The URL starts with https:// instead of http://
• There is a padlock icon in the browser address bar
• The address bar does not display a "Not secure" warning

Why is it necessary?

1. Google requirement – HTTPS has been a ranking factor since 2014
2. Browser warnings – Without HTTPS, Chrome and Firefox display a "Not secure" warning
3. Customer trust – 84% of users will abandon a purchase on an HTTP site
4. Data protection – It encrypts passwords, payment information, and personal data

SSL Types

Free: Let's Encrypt - Available at 99% of hosting providers - Renews automatically every 90 days - Suitable for most websites

Paid (€50–€200/year): - Warranty (up to €1M in case of a data breach) - Higher visual trustworthiness - Wildcard certificate (*.your-site.com)

Common Issues

"Mixed content" Some elements (images, JS) are still loaded via HTTP. Solution: update all links to HTTPS.

Expired certificate Ensure that auto-renewal is functioning. A page with an expired certificate triggers a frightening "Connection not private" warning for the user.

301 redirect from HTTP to HTTPS ```apache RewriteEngine On RewriteCond %{HTTPS} off RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301] ```

Summary

In 2026, SSL is the absolute minimum requirement. It is not a "nice-to-have" – it is the standard.