The benefit of a shock mount is, as the name implies, it decreases the shocks experienced by the microphone.
Use this to attach your Blue Yeti Microphone to the Rode PSA-1 Studio boom arm I recommend this shock mount. The benefit of a shock mount is, as the name implies, it decreases the shocks experienced by the microphone. The mount allows you to suspend the microphone either right side up or upside down and prevent transmission of any vibrations from the desk/supporting surface to the mic. Aka, it makes things nice and quiet.