Relevant data fields
This use case draws on category_1/2/3, brand_name, country, price, original_price, and timestamp, spanning the Product Info and Pricing & Availability groups in our field reference, along with detected_changes for tracking new product launches over time.
average_rating and number_of_reviews from the Reviews & Ratings group are also useful additions, giving a read on how well a growing category or new entrant is actually being received rather than just how fast it's expanding.