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

Results foreggcenter.zigmasoftware.in

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-03-14T00:05:52.481	2021-03-13T23:05:52	2021-06-11T23:05:52	eggcenter.zigmasoftware.in	eggcenter.zigmasoftware.in	C=US, O=Let's Encrypt, CN=R3
2021-03-14T00:05:52.136	2021-03-13T23:05:52	2021-06-11T23:05:52	eggcenter.zigmasoftware.in	eggcenter.zigmasoftware.in	C=US, O=Let's Encrypt, CN=R3
2021-01-13T11:14:15.026	2021-01-13T10:14:14	2021-04-13T10:14:14	eggcenter.zigmasoftware.in	eggcenter.zigmasoftware.in	C=US, O=Let's Encrypt, CN=R3
2021-01-13T11:14:14.693	2021-01-13T10:14:14	2021-04-13T10:14:14	eggcenter.zigmasoftware.in	eggcenter.zigmasoftware.in	C=US, O=Let's Encrypt, CN=R3