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

Results for*.schoolife.app

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-04-19T11:14:50.115	2019-03-25T00:00:00	2020-03-25T12:00:00	sni.cloudflaressl.com	*.schoolife.app	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-04-19T11:14:50.115	2019-03-25T00:00:00	2020-03-25T12:00:00	sni.cloudflaressl.com	*.schoolife.app	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-03-25T18:06:07.251	2019-03-25T00:00:00	2020-03-25T12:00:00	sni.cloudflaressl.com	*.schoolife.app	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2
2019-03-25T18:06:07.251	2019-03-25T00:00:00	2020-03-25T12:00:00	sni.cloudflaressl.com	*.schoolife.app	C=US, ST=CA, L=San Francisco, O="CloudFlare, Inc.", CN=CloudFlare Inc ECC CA-2