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

Results for*.electricianexampletests.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-07-17T07:34:34.103	2020-07-17T06:34:33	2020-10-15T06:34:33	electricianexampletests.com	*.electricianexampletests.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-07-17T07:34:34.103	2020-07-17T06:34:33	2020-10-15T06:34:33	electricianexampletests.com	*.electricianexampletests.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-07-17T07:34:33.915	2020-07-17T06:34:33	2020-10-15T06:34:33	electricianexampletests.com	*.electricianexampletests.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-07-17T07:34:33.915	2020-07-17T06:34:33	2020-10-15T06:34:33	electricianexampletests.com	*.electricianexampletests.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3