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

Results forwww.smokeandmirrors.grad.arizona.edu

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2022-04-06T21:35:58.418	2022-04-06T20:35:58	2022-07-05T20:35:57	smokeandmirrors.grad.arizona.edu	www.smokeandmirrors.grad.arizona.edu	C=US, O=Let's Encrypt, CN=R3
2022-04-06T21:35:58.217	2022-04-06T20:35:58	2022-07-05T20:35:57	smokeandmirrors.grad.arizona.edu	www.smokeandmirrors.grad.arizona.edu	C=US, O=Let's Encrypt, CN=R3
2022-04-06T21:27:26.987	2022-04-06T20:27:26	2022-07-05T20:27:25	www.smokeandmirrors.grad.arizona.edu	www.smokeandmirrors.grad.arizona.edu	C=US, O=Let's Encrypt, CN=R3
2022-04-06T21:27:26.836	2022-04-06T20:27:26	2022-07-05T20:27:25	www.smokeandmirrors.grad.arizona.edu	www.smokeandmirrors.grad.arizona.edu	C=US, O=Let's Encrypt, CN=R3