An SSL/TLS certificate is a small file that lets your server prove its identity to visiting browsers and encrypt the connection between them. Without one, browsers show visitors an explicit "Not Secure" warning, and modern browsers block form submissions on plain HTTP pages.
Why it matters beyond the padlock
- Encrypts data in transit (passwords, form data, cookies)
- Required for HTTPS, which is a confirmed (if modest) Google ranking signal
- Required by most payment processors and increasingly by browsers to enable modern web features at all
Getting one
Free, automated options like Let’s Encrypt cover the vast majority of use cases; paid certificates mainly add extended validation branding or specific warranty terms, not stronger encryption.
FAQ
Is a free SSL certificate less secure than a paid one?
No — the encryption strength is identical; paid certificates differ in validation level and support/warranty, not cryptographic security.