The Red Pen plugin for Obsidian serves as an advanced writing proofreader. It identifies and highlights areas that could be simplified, such as weasel words, hedges, fillers, and other linguistic nuances that weaken writing clarity. The plugin is built on the retext framework and helps users improve the quality of their written content within Obsidian, making it ideal for writers, researchers, and note-takers who want to refine their language and communication. By pinpointing problematic phrases, Red Pen assists in making writing more concise and impactful.