Writing a paper about effect VST (Virtual Studio Technology) plugins is a broad topic. To give you the best guidance, I need to know if you are writing from a technical perspective (coding, digital signal processing), a music production perspective (mixing, creativity), or a historical/business perspective.
Time-Based Effects
Cableguys ShaperBox 3: Famous for rhythm-based effects like volume, panning, and filters. effect vst plugins
Distortion and Saturation
A professional producer uses both types in tandem. Writing a paper about effect VST (Virtual Studio