Bid strategy is one of the highest-leverage decisions in any Google Ads account. Choose the wrong strategy for your campaign's current stage, and you can burn budget, suppress impressions, or hit a conversion plateau that takes weeks to diagnose. Choose correctly, and your campaigns compound on themselves — machine learning continuously refines bids in real time, squeezing more performance from every pound of media spend.
In 2026, the landscape is more sophisticated — and more automated — than ever. Manual bidding has retreated to a niche use case for most advertisers, while Google's Smart Bidding suite has matured to the point where most accounts that resist automation are leaving performance on the table. But automation is not magic. Understanding how each strategy works, which signals it uses, and when to override or constrain it is what separates effective PPC management from expensive guesswork.
This guide covers every major bid strategy available in Google Ads in 2026, explains how each works mechanically, and provides a decision framework for selecting the right approach at each stage of your account's lifecycle.
Manual CPC: Still Relevant, Rarely Optimal
Manual cost-per-click bidding places you in direct control of how much you're willing to pay per click on each keyword or ad group. No machine learning, no automated adjustments — just your bids.
When it still makes sense:
- Brand new accounts with no conversion history (Smart Bidding requires data to function effectively)
- Very low-volume campaigns where automated strategies have insufficient signal
- Deliberate testing scenarios where you want to isolate bid from other variables
- Non-conversion-oriented campaigns (pure awareness) where Smart Bidding signals don't apply
The honest limitation: Manual CPC does not account for auction-time signals — device, time of day, audience, location, browser, and dozens of other contextual factors that Smart Bidding processes in real time. A human cannot replicate this. In most competitive niches, persisting with manual CPC means you're setting flat bids against competitors who are dynamically adjusting theirs based on hundreds of signals.
Enhanced CPC (eCPC), which automatically adjusts your manual bids up or down based on conversion likelihood, is a step toward automation. It can be a useful bridge strategy during data accumulation, but it has largely been superseded by Target CPA and Maximise Conversions.
Maximise Clicks
Maximise Clicks is the simplest automated strategy: Google spends your budget to get as many clicks as possible within your set spend limit.
Appropriate for:
- Brand awareness campaigns where traffic volume is the goal
- New accounts in the early data-collection phase before Smart Bidding has enough signal
- Driving traffic to a new landing page or product launch for qualitative testing
The key risk: Volume without qualification. Maximise Clicks optimises for clicks, not the quality or intent of those clicks. Without tight keyword and audience targeting, you can accumulate clicks from low-intent users that don't progress toward any business outcome.
Never use Maximise Clicks as your long-term performance strategy. Treat it as a temporary engine for accumulating impression and click data, then migrate to conversion-focused strategies once thresholds are met.
Target Impression Share
Target Impression Share sets bids to achieve a specific percentage of impressions in a specified position — anywhere on the results page, top of page, or absolute top of page.
Appropriate for:
- Brand term defence (ensuring your brand appears above competitors bidding on your name)
- Time-sensitive campaigns where visibility is the primary objective
- Competitive conquesting scenarios
Caution: This strategy can become very expensive very quickly when applied to competitive, non-brand keywords. Chasing absolute top impression share for commercial terms with high CPCs can produce excellent visibility metrics alongside abysmal ROAS. Use it deliberately and with a clear budget ceiling.
Target CPA (Cost Per Acquisition)
Target CPA instructs Google to set bids that aim to achieve your desired cost per conversion. The algorithm analyses hundreds of contextual signals at auction time and adjusts bids in real time to hit the target.
Requirements:
- Minimum of 30–50 conversions in the past 30 days (Google's published recommendation; in practice, 50+ produces more stable results)
- Conversion tracking correctly implemented with meaningful conversion actions
- Stable historical conversion data (recent structural changes to campaigns or landing pages can destabilise the algorithm)
How to set an initial target: Start with your actual current CPA from the past 30–90 days as your target. Once the campaign has stabilised on Smart Bidding (typically 2–4 weeks), you can begin gradually tightening the target — reducing it by 10–15% at a time and monitoring for volume impact.
Common mistakes:
- Setting an unrealistically low target CPA immediately, causing the algorithm to under-bid and suppress impressions
- Making frequent target changes that restart the learning period
- Ignoring the quality of conversion actions tracked (e.g., counting page views as conversions alongside purchase events)
Target ROAS (Return on Ad Spend)
Target ROAS is the revenue-focused equivalent of Target CPA. Rather than targeting a cost per conversion, you set a desired return: for every £1 spent, you want £X back in revenue.
Requirements: Same as Target CPA, but with conversion value reporting in place — meaning your conversion tracking must pass revenue values back to Google, not just conversion counts. This is essential for ecommerce and any scenario where different conversions have different monetary values.
Setting targets: A common starting point is your actual historical ROAS minus 10–15%. Give the algorithm room to learn before constraining it with an aspirational target. If your historical ROAS is 400%, starting at 350% is a sensible baseline.
Why Target ROAS outperforms Target CPA for ecommerce: Not all orders are equal. A basket worth £500 and a basket worth £50 are both "conversions" — but they shouldn't attract the same bid. Target ROAS instructs Google to bid more aggressively for higher-value orders, which better reflects the true business economics of your campaigns. Our Google Shopping management service is built around Target ROAS optimisation for ecommerce accounts.
Maximise Conversions
Maximise Conversions spends your full daily budget to generate as many conversions as possible, without a specific CPA target. The algorithm is unconstrained — it will spend to the budget ceiling regardless of what CPA it achieves.
Appropriate for:
- Campaigns in the early Smart Bidding ramp-up phase, after accumulating basic conversion data but before you have reliable historical CPA to set as a target
- Campaigns with flexible budgets where volume is prioritised over efficiency
- New product launches where you want to gather conversion data quickly
The risk: Without a CPA guardrail, Maximise Conversions can generate conversions at any cost. If your budget is larger than the market can efficiently absorb, you may find the strategy bidding up aggressively on marginal traffic. Set budget caps carefully and monitor average CPA closely.
Maximise Conversion Value
Maximise Conversion Value is the revenue-equivalent of Maximise Conversions — spend the full budget to maximise total conversion value, without a specific ROAS target.
The same dynamic applies: useful for ramping up, but requires budget discipline and close monitoring of actual return on spend. Once you have stable ROAS data, graduating to Target ROAS typically improves efficiency.
Portfolio Bid Strategies
Portfolio strategies apply a single Smart Bidding strategy across multiple campaigns, pooling their conversion data into a shared learning model. This is particularly valuable for:
- Accounts with multiple campaigns that individually lack sufficient conversion volume to support their own Smart Bidding strategy
- Closely related campaigns targeting different keyword sets but the same business objective
- Seasonal campaigns that run for short periods and cannot accumulate standalone data
Portfolios are managed from the Shared Library in Google Ads and can be applied to multiple campaigns simultaneously.
Choosing the Right Strategy: A Decision Framework
| Scenario | Recommended Strategy | |---|---| | New account, no conversion data | Manual CPC or Maximise Clicks | | 20–50 conversions/month | Maximise Conversions (budget-capped) | | 50+ conversions/month, fixed CPA goal | Target CPA | | Ecommerce with revenue tracking | Target ROAS | | Brand defence | Target Impression Share | | Awareness campaign | Maximise Clicks or Target Impression Share | | Multi-campaign, low individual volume | Portfolio Target CPA or Portfolio ROAS |
The Learning Period: What to Expect and How to Manage It
When you switch bid strategies or make significant changes to an existing strategy, Google enters a learning period — typically 1–2 weeks. During this time, performance may be volatile: CPA can spike, impression share can drop, and ROAS may fluctuate.
What not to do during the learning period:
- Change your target CPA or ROAS
- Pause or significantly alter the campaign
- Add or remove large numbers of keywords
- Change the budget substantially
Let the algorithm learn. Once it exits learning mode, evaluate performance over a minimum of 2–3 weeks before drawing conclusions or making adjustments.
When to Override Automation
Smart Bidding is not a set-and-forget solution. There are scenarios where manual intervention is necessary:
- Seasonal peaks: Pre-set bid adjustments or temporary budget increases before known demand spikes (Black Friday, end of financial year, etc.)
- Budget exhaustion: If campaigns are running out of budget early in the day, Smart Bidding will over-bid in the morning and miss afternoon traffic
- Conversion tracking breakage: If your tracking is broken, the algorithm is bidding on corrupt data — fix tracking before trusting Smart Bidding to perform
- Ad scheduling exclusions: Certain business hours or days may need to be excluded entirely
Our PPC management service includes proactive bid strategy reviews and adjustment recommendations as part of every monthly reporting cycle.
2026 Update: Value-Based Bidding and Customer Lifetime Value
The frontier of PPC bidding in 2026 is moving toward value-based bidding enhanced with first-party data signals. Rather than simply passing order value to Google, advanced advertisers are now passing adjusted conversion values that account for:
- Customer lifetime value (first-time buyers vs repeat customers)
- Margin by product category
- Predicted churn probability
- Lead quality scores from CRM data
This allows Target ROAS to optimise toward the customers most valuable to your business, not just the orders with the highest gross revenue. Implementing this requires close integration between your CRM, analytics platform, and Google Ads — but the performance uplift for accounts that do it correctly is substantial.
If your current PPC strategy relies on simple conversion counts or unadjusted order values, value-based bidding represents the most significant upgrade available to your account in 2026. Get in touch to discuss how we can help you implement it.
