Choosing a Google Ads bidding strategy comes down to two questions: do your conversions have different values, and do you have enough of them for Google to learn from? If every lead is worth about the same, bid for conversions and, once you have volume, add a target cost per conversion (target CPA). If orders vary in value, bid for conversion value and, once you have volume, add a target return on ad spend (target ROAS). Everything else is about setting targets you can hit and changing them slowly.
Quick answer: Use Maximize conversions for lead generation and other equal-value conversions, adding a target CPA once a campaign has steady volume. Use Maximize conversion value for e-commerce and other variable-value conversions, adding a target ROAS once you have enough conversions with values. Start targets near your last 30 days of actual results, change them in small steps, and wait a conversion cycle or more between changes.
The Smart Bidding Strategies in Plain English
| Strategy | Optimizes for | Best when | Watch out for |
|---|---|---|---|
| Maximize conversions | As many conversions as possible within budget | Conversions are roughly equal in value; you are building volume | Spends the full budget even if cost per conversion rises |
| Maximize conversions with target CPA | Conversions at an average cost per conversion | Steady conversion volume and a known affordable CPA | A target set too low starves delivery |
| Maximize conversion value | As much conversion value as possible within budget | Orders or leads have different values that you track | Needs accurate values; spends the full budget |
| Maximize conversion value with target ROAS | Conversion value at a target return on spend | E-commerce with enough valued conversions | A target set too high starves delivery |
| Target impression share | Showing up in a chosen position | Brand defense | Not built for profit; cap the CPC |
| Manual CPC | Whatever bids you set | Very low volume, testing, tight control | Cannot use auction-time signals |
Enhanced CPC, the old half-step between manual and Smart Bidding, has been phased out for Search and Display campaigns, so the real choice today is between the Smart Bidding strategies above and manual CPC.
Which Strategy Fits Your Business
| Business | Start with | Move to | Conversion to track |
|---|---|---|---|
| Local service (plumber, dentist, lawyer) | Maximize conversions | Target CPA | Calls and qualified form leads |
| B2B lead generation | Maximize conversions | Target CPA, or value-based bidding with offline conversions | Qualified leads imported from your CRM |
| E-commerce store | Maximize conversion value | Target ROAS | Purchases with order value |
| App | Maximize conversions on installs | Target cost per install or in-app action | Installs, then key in-app events |
| New account, few conversions | Maximize conversions (no target) | Add a target after volume builds | The best available real action |
If your leads vary a lot in quality, the biggest upgrade is not a bidding strategy but better data: import qualified leads or closed sales from your CRM as offline conversions, give them values, and switch to value-based bidding.
How to Set a Target You Can Actually Hit
- Work out what you can afford. For e-commerce, use the break-even ROAS calculator; for leads, divide what a customer is worth by how many leads it takes to win one.
- Look at what the campaign actually achieved over the last 30 days.
- Set the first target close to the actual result, not the ideal one. A target far below reality stops the campaign from bidding in most auctions.
- Tighten in small steps toward the affordable number once the campaign is stable.
Use the Google Ads budget calculator alongside this: if the cost per conversion you can expect at today's CPC and conversion rate is above your target, no bidding strategy will close the gap. Fix conversion rate or traffic quality first.
Changing Targets Without Breaking Learning
- Change one thing at a time: target, budget or structure, not all three.
- Move targets in small steps, often 10 to 15 percent, rather than big jumps.
- Wait at least one conversion cycle (the time from click to conversion) before judging, and longer for low volumes.
- Expect a learning period after a new strategy or a large change. Google says it usually takes up to about 50 conversion events or three conversion cycles to calibrate.
- Do not react to a single bad day. Judge on a week or more of settled data.
When Manual CPC Still Makes Sense
Manual CPC still has a place: brand-new accounts with no conversion history, very small budgets, niche campaigns with a handful of clicks a day, or tests where you need exact control over what each keyword pays. Even there, plan to move to Smart Bidding once conversions are flowing, because auction-time signals such as device, location, time and query are only available to automated bidding.
Testing a New Bidding Strategy Safely
Rather than switching a whole campaign, run a campaign experiment: the test arm uses the new strategy on a share of traffic while the original keeps running, and both share the budget. After enough conversions to judge, end the experiment or apply the winning strategy to the campaign.
How Loraloop Adjusts Bids and Targets
Loraloop's ads agent, Angie, runs a nightly optimizer for Google Ads with four small, bounded moves: tighten a target CPA, tighten a target ROAS, lower a keyword CPC bid, and lower a daily budget a campaign cannot spend. It never raises a bid or budget on its own. Changing a bidding strategy, setting a new target CPA or ROAS, and adjusting device bids within a bounded range are available on request, and Angie can set up a bidding experiment on 10 to 90 percent of a Search or Display campaign's traffic, then end it or promote the winner. By default every change waits for your approval and can be undone, and daily, monthly and per-campaign spend caps are checked at the moment a change runs.
Frequently Asked Questions
Is target CPA or target ROAS better?
Neither is better in general. Target CPA suits conversions of roughly equal value, such as leads. Target ROAS suits conversions with different values, such as e-commerce orders. Choose the one that matches how your business makes money.
How many conversions do I need for target CPA?
Google no longer enforces a hard minimum, but Smart Bidding learns faster with more data. Many practitioners like about 30 conversions a month per campaign before setting a strict target, and use Maximize conversions without a target below that.
Why did my campaign stop spending after I set a target CPA?
The target is probably too low compared with what the campaign achieves, so it bids in very few auctions. Raise the target close to your recent actual CPA, then lower it gradually.
How often should I change my target CPA or ROAS?
Rarely, and in small steps. Wait at least one conversion cycle between changes, and longer if conversions are few, so you can see the effect of each change before making the next.
Can AI manage Google Ads bidding?
Google's Smart Bidding already sets the bid for every auction. An AI agent on your side, such as Loraloop, manages the targets, budgets and experiments around it, in small bounded steps and with your approval.
Keep targets and budgets on track without daily check-ins: Angie proposes small, reversible steps and you approve them in one place.
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