Google Performance Max Ads Optimization - Bigcommerce store

My large-catalogue e-commerce store relies heavily on Google Shopping via Performance Max, yet the conversion rate on our top-selling items is slipping. I need someone to step in right away, review the current campaigns, and apply data-driven changes that lift conversions without inflating spend.

You’ll get full access to Google Ads, Merchant Center, and the product feed. In return, I expect:
• An audit summary pinpointing feed or campaign factors limiting conversions
• Hands-on adjustments—feed fixes, audience signals, bid strategy tweaks, creative asset updates—focused on our best-selling SKUs
• A concise wrap-up that details what you changed, why, and how we’ll measure success over the next 2-4 weeks

If you have proven wins improving conversion rates for Performance Max on stores with thousands of products, I’d love to see an example. I’m ready to grant access as soon as we agree, so timing is important.