Docs: Add more context in Mimikatz credentials collector feature page

docs/content/features/credentials_collectors/mimikatz.md

@@ -8,6 +8,10 @@ pre: "<i class='fa fa-cat'></i> "
 
 ## Description
 
+Mimikatz is an open-source tool widely used by attackers to extract plaintext
+passwords, hashes, PINs, and Kerberos tickets from memory, which assist in
+privilege escalation and lateral movement.
+
 The Mimikatz Credentials Collector uses [pypykatz](https://github.com/skelsec/pypykatz)
 (a pure-Python implementation of [mimikatz](https://github.com/gentilkiwi/mimikatz))
 to steal credentials from Windows Credential Manager.