Amazon.com: Customer reviews: A Basic How to Use Essential Oils Guide for Colds & Allergies: 125 Aromatherapy Oil Diffuser & Healing Solutions for Colds, Allergies, Headaches & Sinus ... Recipes and Natural Home Remedies Book 3)
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.