What can this help me achieve?
I assume you are referring to an RF site survey. It is very important to conduct a site survey to determine what RF devices are currently operating within the facility at which you plan to deploy a radio frequency identification solution, and which might potentially interfere with the system (the RFID technology might interfere with existing devices as well). A site survey can reveal potential problems with RF energy bouncing off diamond plating on the floor, for instance, or rebar in the concrete floor or walls. This can help prevent problems reading tags consistently.
A thorough site survey will also look at machinery located near interrogation zones, equipment used part-time (for example, delivery trucks might utilize equipment that interferes with the RFID system, but these might not be present all the time) and other potential interference sources. These issues can then be addressed before or when you install the equipment, thereby preventing you from discovering a costly problem after the equipment has been installed.
—Mark Roberti, Founder and Editor, RFID Journal