Complex sentence: The main purpose of the wheel is to allow a retailer to suggest different fragrances in a similar category to ones that their customer's may prefer, which since been put into use by retailers such as Sephora and Nordstrom.
Split into simpler sentences: The main purpose of the wheel is to allow a retailer to suggest different fragrances in a similar category to ones that their customers may prefer. It has been put into use by retailers such as Sephora and Nordstrom.