Self-signed certificate

What's going on

The certificate vouches for itself — no certificate authority signed it. Browsers show 'Your connection is not private' because nobody independent confirms the identity.

How to fix it

For a public website: replace it with a CA-issued certificate (Let's Encrypt is free and automated). For internal tools: either issue certificates from an internal CA that your devices trust, or install this specific certificate into the trust store of each machine that needs it — never train users to click through warnings.

New to certificates? Start with the guide: How to read an SSL certificate.