When Zemana Mobile Antivirus finds malware in your device, you will see the threat list as shown in picture 1. If you click on a threat, you will get the menu as shown in picture 2.
You should add the application to white list and send us a false positive report on the application. We will fix the issue as soon as possible.
Fast scan performs scanning of installed applications, while full scan preforms scanning of all the files in the internal storage and the SD-Card along with the installed applications.
Recommended options for your security will be preselected.
PUA stands for potentially unwanted applications. They are not necessarily malware but they harm user experience with unwanted behaviour like showing excessive ads and pop-ups.