An SSL certificate secures communication between your website and its visitors by enabling HTTPS. Proper SSL configuration improves security, trust, SEO, and performance. This article outlines the best practices to follow when using SSL on any domain.

1. Always Use HTTPS (Force SSL)

Ensure all traffic uses HTTPS.

Why it matters

• Prevents data interception

• Avoids “Not Secure” browser warnings

• Required for modern browsers and features

How

• Redirect all HTTP traffic to HTTPS

• Update website URLs to use https://

2. Use a Trusted SSL Certificate

Use SSL from a trusted Certificate Authority (CA).

Recommended

• Free SSL (AutoSSL / Let’s Encrypt) for most websites

• Paid SSL (OV/EV) only if business verification is required

???? For SEO and security, free SSL is sufficient.

3. Enable Auto-Renewal

SSL certificates expire.

Best practice

• Use AutoSSL or automatic renewal

• Monitor expiration dates

• Avoid manual renewals where possible

Expired SSL can break your website and emails.

4. Fix Mixed Content Issues

Mixed content occurs when:

• HTTPS page loads HTTP images, scripts, or CSS

Why it matters

• Breaks padlock icon

• Causes browser security warnings

• Reduces trust

How

• Use HTTPS URLs for all assets

• Update hardcoded HTTP links

5. Secure All Subdomains

SSL should cover:

• www.yourdomain.com

• mail.yourdomain.com

• blog.yourdomain.com

• shop.yourdomain.com

Best practice

• Use Wildcard SSL or AutoSSL covering subdomains

6. Use Modern TLS Versions

Disable outdated protocols.

Recommended

• TLS 1.2 and TLS 1.3 only

• Disable SSLv2, SSLv3, TLS 1.0, TLS 1.1

This improves security and browser compatibility.

7. Enable HTTP/2 or HTTP/3

Modern protocols require SSL.

Benefits

• Faster page loading

• Better performance under traffic

• Improved user experience

Most modern servers enable this automatically with SSL.

8. Redirect Canonical URLs Correctly

Avoid duplicate content issues.

Best practice

Choose one version:

Redirect the other permanently (301 redirect).

9. Update External Integrations

Ensure all third-party services use HTTPS:

• APIs

• Payment gateways

• CDN links

• Embedded scripts

10. Test SSL Configuration Regularly

After installing or renewing SSL:

• Check padlock icon

• Test forms and logins

• Verify email sending (SMTP over SSL)

• Ensure redirects work correctly

Common SSL Mistakes to Avoid

❌ Leaving HTTP accessible
❌ Ignoring mixed content warnings
❌ Forgetting SSL renewal
❌ Using self-signed certificates in production
❌ Securing only the main domain and not subdomains

SSL Best Practices Summary

Conclusion

Following SSL best practices ensures your domain is secure, trusted, SEO-friendly, and future-proof. SSL is no longer optional—every domain should use HTTPS with proper configuration.