A Dream Pillow is a "pillow" filled with herbs & intentions to help ease sleep disturbances & return the bearer to restful & restorative sleep.
 
They're essentially a form of a protective ward (dream spell).
 
They can serve many purposes depending on what the "pillow" is filled with - safeguarding from nightmares, providing restful sleep, sweet dreams, mental clarity, dream recollection, & so much more.