The auction is not a price auction
Google ranks ads on a combination of bid, expected click-through rate, ad relevance and landing page experience, plus the impact of your assets. A more relevant ad at a lower bid routinely beats a less relevant one at a higher bid.
What that means practically
- Improving relevance lowers what you pay for the same position.
- Sending traffic to a page that answers the search is an ads lever, not just a UX one.
- Shopping is decided largely by your feed, because the feed is what Google matches.
Why this matters for budget
If you are losing auctions on relevance, more budget does not buy more sales — it buys more of the same losing. That is the difference between an account that scales and one that plateaus.