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

Results fordevrachit.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-03-02T10:47:18.515	2020-03-02T09:47:18	2020-05-31T09:47:18	devrachit.com	devrachit.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-03-02T10:47:18.221	2020-03-02T09:47:18	2020-05-31T09:47:18	devrachit.com	devrachit.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-12-30T14:26:16.002	2019-12-30T13:26:15	2020-03-29T13:26:15	wookki.net	devrachit.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-12-30T14:26:15.79	2019-12-30T13:26:15	2020-03-29T13:26:15	wookki.net	devrachit.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-12-30T10:01:38.583	2019-12-30T09:01:38	2020-03-29T09:01:38	devrachit.com	devrachit.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-12-30T10:01:38.39	2019-12-30T09:01:38	2020-03-29T09:01:38	devrachit.com	devrachit.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3