We've been on line for 23 years. We used Google Adwords for more than a decade. so we have tons of data. know our keywords, customer....Google has told us to only use Google Shopping since 80-90% of customers come to us via mobile. We have Data Feed. We have a campaign for each main category and ad groups for each page on our site. We also have problems. We need an expert to fix any error, make sure landing page is correct, long tail keywords...whatever needs to be done to capture more sales. Once you get this working as it should, you could remain as our google manager - adjusting as facts develop. We have about 1,000 SKU. I know some of what's wrong but don't know how to fix. I'm sure there's stuff I'm not aware of that needs to be done too. My budget is slim until the sales drive it upwards. Please let me know your thoughts...I'm ready to do this now. You also need to know Magento or have access to someone who does.