Most "keygen" executables are bundled with malware, ransomware, or miners . Because these tools require you to disable your antivirus to run, they provide an open door for infecting your system.
Autodesk has moved to a subscription-based model. Using cracked software for professional work can lead to heavy fines during a software audit. The Better Alternative
A product key is a unique code provided by Autodesk that unlocks the software. The product key is used to activate the software and ensure that it is genuine.