Google Shopping Ads use an existing Merchant Center product data (not keywords) to decide how and where to show your Ads. This itself is valid reason to allow experts to set it up or run it efficiently for you.
The product data you submit through Merchant Center contains details about the products you sell. Google uses these details when it matches a user’s search to your ads, making sure to show the most relevant products.
Your product inventory and the number of markets which you can ship to will always be limited by your Ads budget.
We manage and optimise Shopping Ads in Google Ads for you and you manage your products and sales.