Quick summary
- Term
- Wildcard Certificate
- Plain-English definition
- A wildcard certificate secures a domain and its first-level subdomains, such as `*.example.com`.
- Technical definition
- A wildcard certificate secures a domain and its first-level subdomains, such as `*.example.com`.
- Commonly confused with
- Related domain, DNS, registrar, API, or agent-infrastructure terms.
- Related terms
- SSL Certificate, DNS-01 Challenge, TLS
Definition
A wildcard certificate secures a domain and its first-level subdomains, such as `*.example.com`.
Why it matters
Wildcard certificates are useful when many subdomains need HTTPS.