Tagalys collects and analyzes all visitor actions on products (views/add to carts/ purchases) at your online store and the source of each action. Using this data, we have a very good understanding of why visitors click on products or what products are most likely going to sell.
If you want to know how a search query or product listing page performed, you might use a free tool like google analytics. But if you want to specifically know how each SKU performed (views/add to carts/ purchases) for that search query or in that product listing page, and be able to segment that by device, categories & attributes etc., we have that report. This can help you specifically understand which SKU had the best engagement for the marketing campaign for "Summer Dresses", what price points had the most engagement for the campaign and much more specific SKU level insights.