Trust and pricing are the two very important factors in running a successful Google Shopping campaign, as such, continually checking your price competitiveness on a regular basis & adjusting prices and bids where applicable will help you have success on your account. Look for products which have a high volume of searches and which are profitable, from there, deduce which have a low number of well-priced competitors and look for opportunities. Lowering the price of your products could significantly decrease your cost per acquisition, therefore actually improving the profitability despite charging less.
Another way to improve how consumers perceive your business online is by using seller ratings. Seller ratings is a free programme, provided by Google, that collects post-purchase reviews on behalf of merchants and displays the aggregated reviews to users on Google Shopping from 1 star, to 5 stars. Reviews online can greatly improve the trust a consumer will have in your business and increase the odds that they will choose to do business with you, rather than a slightly higher priced, but better-known retailer.