Strip bold, colors, fonts, and stray styling to get clean plain text in Word.
Drag over a section, or press Ctrl+A (Cmd+A on Mac) to select the whole document.
On the Home tab, it's the eraser-with-an-A icon in the Font group. This resets the selection to the default style, removing bold, color, odd fonts, and sizes.
Ctrl+Spacebar clears character formatting; Ctrl+Q clears paragraph formatting (Cmd versions on Mac). Handy when you want to reset just part of a line.
To avoid dragging in formatting from a web page, paste with Ctrl+Shift+V, or use Paste Options > "Keep Text Only." Saves you cleaning up afterward.