Answer: Software testing
Explanation:
Software testing refers to testing for the compatibility of the client's device with the software or hardware product being offered.
In order for the client to be able to use the software, it needs to be compatible with both the software already in the client device as well as the hardware. If it isn't, the product will not be able to add much value to the client's device which would mean that it is not fulfilling it's required functions.