1) Located the product group you want to subdivide
2) Click to its name
3) In the window that appears, select the drop-down menu next to “Subdivide"
4) Choose a product attribute to define your new product group
QUICK TIP for Ad campaigns:
Optimization is a key factor to spending less on AdWords. Make sure you are being wary when setting your budget as you could be spending an unnecessary amount of money. By optimizing you’ll discover what is working, and what is not. From there you’ll be able to make educated decisions for the betterment of your store. If you want to optimize and automate your advertising campiagns, you can use this Google Ads and Shopping free app for Shopify.