If you’re looking to optimize bidding and boost ROI in Google Shopping, the AdWords Dimensions tab has a treasure trove of performance metrics to inform strategic campaign test optimizations. You can see clicks, CPC, and conversions on individual products by day of the week and down to hour of the day. With this insight, you can adjust bids to reduce spend on clicks that are too costly or unprofitable, and increase spend on those that are driving revenue. And this is only scratching the surface of insight available from the depths of AdWords.