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

Results forwww.api.smartpath.app

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-08-06T19:18:55.414	2020-08-06T19:18:54	2021-08-06T19:18:54	api.smartpath.app	www.api.smartpath.app	C=US, ST=Arizona, L=Scottsdale, O="Starfield Technologies, Inc.", OU=http://certs.starfieldtech.com/repository/, CN=Starfield Secure Certificate Authority - G2
2020-08-06T16:07:51.944	2020-08-06T00:00:00	2021-08-06T23:59:59	api.smartpath.app	www.api.smartpath.app	C=GB, ST=Greater Manchester, L=Salford, O=Sectigo Limited, CN=Sectigo RSA Domain Validation Secure Server CA
2020-08-06T16:07:51.539	2020-08-06T00:00:00	2021-08-06T23:59:59	api.smartpath.app	www.api.smartpath.app	C=GB, ST=Greater Manchester, L=Salford, O=Sectigo Limited, CN=Sectigo RSA Domain Validation Secure Server CA