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

Results forwww.mik-microsite.madeinkatana.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-05-20T23:40:32.744	2019-05-20T22:40:32	2019-08-18T22:40:32	microsite.madeinkatana.com	mik-microsite.madeinkatana.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-05-20T23:40:32.037	2019-05-20T22:40:32	2019-08-18T22:40:32	microsite.madeinkatana.com	mik-microsite.madeinkatana.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-03-04T22:22:18.907	2019-03-04T21:22:18	2019-06-02T21:22:18	microsite.madeinkatana.com	mik-microsite.madeinkatana.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-03-04T22:22:18.167	2019-03-04T21:22:18	2019-06-02T21:22:18	microsite.madeinkatana.com	mik-microsite.madeinkatana.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3