Manual bidding in Google Ads is becoming a thing of the past. Smart Bidding uses machine learning to optimize your bids in real time, analyzing millions of signals that no human could process. Here is how to use it effectively.
What Is Smart Bidding?
Smart Bidding is a subset of Google’s automated bidding strategies that uses machine learning to optimize for conversions or conversion value in every auction. It considers signals like device, location, time of day, remarketing list, browser, language, and dozens of other contextual factors.
Smart Bidding Strategies Explained
Target CPA (Cost Per Acquisition)
Sets bids to get as many conversions as possible at your target cost per acquisition. Best for campaigns with consistent conversion volumes and a clear target cost per lead or sale. You need at least 30 conversions in the last 30 days for reliable performance.
Target ROAS (Return on Ad Spend)
Optimizes bids to achieve your target return on ad spend. Ideal for ecommerce campaigns where different products have different values. Requires conversion value tracking and at least 50 conversions in 30 days.
Maximize Conversions
Spends your entire budget to get the maximum number of conversions. Good for campaigns where you care about volume more than cost efficiency. Be careful with this strategy as it will spend your full daily budget.
Maximize Conversion Value
Similar to Maximize Conversions but focuses on total conversion value rather than count. Great for businesses where not all conversions are equal in value.
How to Set Up Smart Bidding for Success
1. Fix Your Conversion Tracking First
Smart Bidding is only as good as the data you feed it. Ensure your conversion tracking is accurate, counting the right actions, and not double counting. Garbage in equals garbage out.
2. Give It Enough Data
Smart Bidding needs conversion history to learn from. If your campaign is brand new, start with Maximize Clicks to gather data, then switch to a Smart Bidding strategy once you have enough conversions.
3. Set Realistic Targets
If your current CPA is $50, do not set a Target CPA of $20. Start with a target close to your actual performance, then gradually reduce it as the algorithm optimizes. Aggressive targets starve your campaigns of traffic.
4. Allow a Learning Period
Smart Bidding needs two to four weeks to learn. During this period, performance may fluctuate. Resist the urge to make changes during the learning phase. Every significant change resets the learning period.
5. Use Portfolio Bid Strategies
For accounts with multiple campaigns targeting similar goals, portfolio bid strategies pool data across campaigns, giving the algorithm more signals to work with and improving performance faster.
Common Mistakes to Avoid
- Changing targets too frequently disrupts the learning algorithm
- Not having enough conversion volume for the chosen strategy
- Using Smart Bidding with broad match keywords without proper negative keyword lists
- Ignoring audience signals that can improve bid optimization
- Setting daily budgets that are too restrictive for the algorithm to operate
Is Smart Bidding Right for You?
If your campaigns have consistent conversion volume and accurate tracking, Smart Bidding will almost certainly outperform manual bidding over time. The key is patience, proper setup, and realistic expectations during the learning period.