Adobe security checks primarily involve settings that expose you to risk through mediums such as PDFs. While not as well-known, PDFs can and do pose a threat to computers by having PDFs carry malicious attachments or run malicious scripts to damage your computer. By enforcing certain security controls, you can be notified of any suspicious activity performing from files, lessening your risk to unknown or malicious sources.
Enhanced Security for Adobe Reader DC (Application) - A001
Enhanced Security for Adobe Reader DC (Web Browser) - A002
Enable Protected Mode - A003
Prevent Adobe Flash - A004
Prevent Attachments - A005