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

Results fordan.fifavr.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2022-05-09T21:02:51.741	2022-05-09T20:02:51	2022-08-07T20:02:50	dan.fifavr.com	dan.fifavr.com	C=US, O=Let's Encrypt, CN=R3
2022-05-09T21:02:51.459	2022-05-09T20:02:51	2022-08-07T20:02:50	dan.fifavr.com	dan.fifavr.com	C=US, O=Let's Encrypt, CN=R3
2022-02-07T19:44:39.117	2022-02-07T18:44:38	2022-05-08T18:44:37	dan.fifavr.com	dan.fifavr.com	C=US, O=Let's Encrypt, CN=R3
2022-02-07T19:44:38.854	2022-02-07T18:44:38	2022-05-08T18:44:37	dan.fifavr.com	dan.fifavr.com	C=US, O=Let's Encrypt, CN=R3
2021-10-28T21:31:15.287	2021-10-28T20:31:14	2022-01-26T20:31:13	dan.fifavr.com	dan.fifavr.com	C=US, O=Let's Encrypt, CN=R3
2021-10-28T21:31:14.901	2021-10-28T20:31:14	2022-01-26T20:31:13	dan.fifavr.com	dan.fifavr.com	C=US, O=Let's Encrypt, CN=R3