The keyword vst plugin waveshell2vst3 120x64 vst3 is a testament to the complexity of modern plugin management. It is not a sexy synthesizer or a vintage compressor emulation—it is the that delivers your Waves ecosystem to your DAW.
Based on the filename convention provided, this appears to be a used by Waves Audio to bridge older VST2 ( .dll ) plugins into the modern VST3 ecosystem.
WaveShell2-VST3 12.0_x64.vst3 is the engine room for your Waves v12 plugins. It is a container file designed to load multiple instruments and effects under one roof. While the architecture can sometimes confuse plugin scanners, it is a stable system once set up correctly.
The shell tells your DAW which Waves plugins are installed. The Version: "12.0" refers to Waves Version 12 (V12).