A new Google Performance Max feature lets you combine products and create collections – for ads or free product listings. Collections can also enrich product data, which could result in enhanced product performance, increased engagement and a richer customer experience. They are only available for local products sold within Performance Max for store goals. Google is yet to roll out its Collections feature for wider-scale or international promotions and yet to confirm its future plans for this feature.. The program is still vert much in pilot mode and Google is not currently providing options for customers to opt in.