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

Results for*.test.amberscript.deeploy.ml

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-03-31T10:05:59.962	2021-03-31T09:05:59	2021-06-29T09:05:59	*.test.amberscript.deeploy.ml	*.test.amberscript.deeploy.ml	C=US, O=Let's Encrypt, CN=R3
2021-03-31T10:05:59.962	2021-03-31T09:05:59	2021-06-29T09:05:59	*.test.amberscript.deeploy.ml	*.test.amberscript.deeploy.ml	C=US, O=Let's Encrypt, CN=R3
2021-03-31T10:05:59.587	2021-03-31T09:05:59	2021-06-29T09:05:59	*.test.amberscript.deeploy.ml	*.test.amberscript.deeploy.ml	C=US, O=Let's Encrypt, CN=R3
2021-03-31T10:05:59.587	2021-03-31T09:05:59	2021-06-29T09:05:59	*.test.amberscript.deeploy.ml	*.test.amberscript.deeploy.ml	C=US, O=Let's Encrypt, CN=R3