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

Results for*.quizble.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-07-17T20:43:20.532	2020-07-14T00:00:00	2021-07-15T12:00:00	quizble.com	*.quizble.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-07-17T20:43:20.532	2020-07-14T00:00:00	2021-07-15T12:00:00	quizble.com	*.quizble.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-07-14T18:59:55.108	2020-07-14T00:00:00	2021-07-15T12:00:00	quizble.com	*.quizble.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-07-14T18:59:55.108	2020-07-14T00:00:00	2021-07-15T12:00:00	quizble.com	*.quizble.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1