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Method 1️⃣ - Stream Optimization
With Stream reporting and optimization, you can reallocate budget away from low‑profit periods (when expected ACoS is high) and concentrate your spend on the specific hours and days when your campaign ACoS is lowest.
For example, with Stream, you could see how your unbranded campaign has performed in the last 30 days from May to June. Discovering that ACoS and CPC are the highest on Saturdays and Sundays from 12:00 - 3:00 am, you can lower bids by 50%. Decreasing your aggression during these inefficient periods is likely to make your account run more profitably.
You can compare the hourly and daily breakdown of several metrics, but to optimize for ACoS, try looking at ACoS, CPC, and CVR. After implementing your Stream schedule, make sure you monitor sales closely to prevent sales loss.
🚨Note: Stream optimization can be applied to SP goals at a segment level (including Custom Goals and Keyword Boosts). Changes to AUTO campaigns can't be applied.🚨
Method 2️⃣ - Implement Min/Max Bid
If you find yourself facing consistently high CPC, consider setting maximum bids for underperforming segments to reduce costs. For instance, if a competitor segment has excessively high CPC, rather than simply decreasing the Target ACoS to cut bids, you might want to maintain competitiveness without sacrificing bid reduction across the board. You can find more information on Min/Max bids here.