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

Results forwww.trioadvisor.fr

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2022-07-20T18:51:37.828	2022-07-20T17:51:37	2022-10-18T17:51:36	trioadvisor.fr	*.trioadvisor.fr	C=US, O=Let's Encrypt, CN=E1
2022-07-20T18:51:37.51	2022-07-20T17:51:37	2022-10-18T17:51:36	trioadvisor.fr	*.trioadvisor.fr	C=US, O=Let's Encrypt, CN=E1
2021-01-09T12:43:52.707	2021-01-09T11:43:52	2021-04-09T11:43:52	trioadvisor.fr	*.trioadvisor.fr	C=US, O=Let's Encrypt, CN=R3
2021-01-09T12:43:52.422	2021-01-09T11:43:52	2021-04-09T11:43:52	trioadvisor.fr	*.trioadvisor.fr	C=US, O=Let's Encrypt, CN=R3
2020-11-10T12:36:08.128	2020-11-10T11:36:07	2021-02-08T11:36:07	windstrram.net	*.trioadvisor.fr	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-11-10T12:36:07.924	2020-11-10T11:36:07	2021-02-08T11:36:07	windstrram.net	*.trioadvisor.fr	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3