# Set up SSL: secure HTTPS correctly

All about SSL/TLS: certificates, HTTPS redirection, HSTS and browser security for your domain.

HTTPS is mandatory today. Here is how to set up SSL correctly and avoid common mistakes.

## How to do it

- **Choose a valid certificate** from Let’s Encrypt or another CA.
- **Redirect HTTP to HTTPS** and avoid duplicate content.
- **Enable HSTS** to force secure connections.
- **Test certificate chain and security** with an SSL assessment.
- **Use current TLS versions** and disable old protocols.

HTTPS increases visitor trust and boosts ranking. Also see our explanation of [DNS and domains](/en/domain/dns-what-is-it).