If you are rubber stamping and using the embossing technique, this is a must have to eliminate dust and grease from your medium before stamping, ensuring that your embossing powder sticks to the design, not your craft card.
The anti-static dusting bag will help to eliminate static, smears, smudges, fingerprints and stray flecks of embossing powder that could appear on your work.
To use just wipe gently on your surface before stamping and embossing, then shake, wipe or brush off the residue.