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

Results for*.arbary.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-08-07T13:24:02.473	2020-08-05T00:00:00	2021-08-06T12:00:00	arbary.com	*.arbary.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-08-07T13:24:02.473	2020-08-05T00:00:00	2021-08-06T12:00:00	arbary.com	*.arbary.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-08-05T14:25:31.748	2020-08-05T00:00:00	2021-08-06T12:00:00	arbary.com	*.arbary.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-08-05T14:25:31.748	2020-08-05T00:00:00	2021-08-06T12:00:00	arbary.com	*.arbary.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1