It can be anything! An apex, subdomain, or even a URL.

Results for*.goppi.co

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-01-20T11:15:24.491	2020-01-18T00:00:00	2021-01-18T12:00:00	goppi.co	*.goppi.co	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-01-20T11:15:24.491	2020-01-18T00:00:00	2021-01-18T12:00:00	goppi.co	*.goppi.co	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-01-18T13:19:05.124	2020-01-18T00:00:00	2021-01-18T12:00:00	goppi.co	*.goppi.co	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-01-18T13:19:05.124	2020-01-18T00:00:00	2021-01-18T12:00:00	goppi.co	*.goppi.co	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1