Short answer: The right Google Ads bidding strategy depends on what you can measure and how much conversion data you have. With reliable tracking but little history, start with Maximize conversions. Once the campaign has steady conversions, move to Target CPA if every lead is worth about the same, or to Maximize conversion value and then Target ROAS if sales have different values. Manual CPC still has a place, but mostly for tight control, tests or accounts without trustworthy conversion data.
This guide explains each of the main Google Ads bidding strategies in plain English, the order I usually move through them, and the mistakes that quietly waste budget. It is written for business owners who want to understand what their account is doing, and for anyone checking whether their current setup makes sense.
How Google Ads bidding strategies work today
Every time your ad is eligible to show, Google runs an auction. Your bid strategy decides how much you are willing to pay in that auction. There are two broad families:
- Smart Bidding: strategies that use Google AI to bid for conversions or conversion value in every auction. Google lists four: Target CPA, Target ROAS, Maximize conversions and Maximize conversion value (Google Ads Help: About Smart Bidding).
- Other strategies: Manual CPC, Maximize clicks and Target impression share. These optimise for clicks or visibility, not for results.
Smart Bidding sets bids at auction time using signals such as device, location, time of day, remarketing lists and the actual search query. No human can adjust bids that finely by hand, which is why automated bidding is the default choice for most accounts that track conversions properly.
Two naming changes are worth knowing. First, Enhanced CPC is gone: Google says it stopped being available the week of 31 March 2025, and campaigns that used it now effectively run on Manual CPC (Google Ads Help: About automated bidding). Second, in June 2026 Google began relabelling “Maximize conversions with a Target CPA” back to Target CPA, and “Maximize conversion value with a Target ROAS” back to Target ROAS. Google says bidding behaviour does not change (Search Engine Land). If your account shows a mix of old and new names for a while, that is the reason.
The main strategies compared
| Strategy | What it aims for | Best fit |
|---|---|---|
| Maximize conversions | Most conversions for the budget | New campaigns with good tracking, limited history |
| Target CPA | Conversions at an average cost you set | Lead generation where each lead has a similar value |
| Maximize conversion value | Most revenue or value for the budget | eCommerce or leads with different values |
| Target ROAS | Value at a return on ad spend you set | Stores with steady sales and accurate values |
| Manual CPC | A maximum price per click you set | Tests, very low volume, or no reliable tracking |
| Maximize clicks | Most clicks for the budget | Short-term traffic goals, rarely sales |
When to use each strategy
Maximize conversions
Maximize conversions tries to get the most conversions while spending your budget (Google Ads Help: About Maximize conversions). That last part matters. It is designed to spend the full daily budget, so if a campaign has been underspending on Manual CPC, costs can jump after the switch. I use it to start new conversion campaigns, then keep a close eye on cost per conversion for the first few weeks.
Target CPA
Target CPA bids to get as many conversions as possible at the average cost per action you choose. Google suggests a target based on your average CPA from the last 30 days, adjusted for conversion delays, and recommends judging results over at least 30 days and 30 conversions (Google Ads Help: About Target CPA bidding). It suits service businesses where a lead from one keyword is worth roughly the same as a lead from another.
Maximize conversion value and Target ROAS
These two bid for value rather than volume. Target ROAS needs conversion values set up first. Google lists minimums such as 15 conversions in 30 days for Search and Shopping, notes that daily spend can reach up to twice your average daily budget, and says performance tends to improve with fewer, larger campaigns (Google Ads Help: About Target ROAS bidding). For eCommerce, I start with Maximize conversion value and add a ROAS target once revenue data is stable.
Manual CPC
With Manual CPC you set a maximum cost per click, and you usually pay less than that maximum (Google Ads Help: About manual CPC bidding). It gives control but ignores most auction signals. I keep it for niche tests, brand campaigns where I want strict cost limits, or accounts where conversion tracking cannot yet be trusted.
How a specialist picks a bid strategy: step by step
This is the decision process I follow when setting up or reviewing a campaign:
- Check the tracking first. Smart Bidding learns from every action counted in the Conversions column. If that column includes page views, button clicks or duplicate tags, the strategy will optimise for the wrong thing. Fixing GA4 and Google Tag Manager tracking comes before any bid change.
- Decide between volume and value. If all conversions are worth roughly the same, optimise for conversions. If they differ, such as order values or lead types, pass values and optimise for value.
- Look at conversion volume. A campaign with a handful of conversions a month gives the algorithm little to learn from. Consolidating similar campaigns, or bidding on a portfolio across campaigns, often helps more than any setting.
- Start without a target, then add one. Begin with Maximize conversions or Maximize conversion value, gather data, then set a Target CPA or Target ROAS close to what the campaign is already achieving.
- Change targets gradually. Large jumps in targets can restrict delivery or push spend up suddenly. Small steps, with a week or two between them, are easier to read.
- Review against business numbers. A good CPA in Google Ads only matters if those leads close. Compare platform data with your CRM or sales records every month.
Common bidding mistakes that waste budget
- Setting a target from a wish, not data. A Target CPA far below what the campaign has ever achieved usually means fewer impressions and fewer conversions, not cheaper ones.
- Counting soft actions as primary conversions. If newsletter sign-ups and purchases are both primary, the system will happily chase the cheaper one.
- Changing too much at once. Switching strategy, budget and ads in the same week makes it impossible to tell what caused the result.
- Splitting campaigns too thinly. Many small campaigns each starve for data. Structure should serve the bidding, not the other way round.
- Expecting bid adjustments to work. With Maximize conversions and Target ROAS, most bid adjustments are ignored, apart from a minus 100% device adjustment.
What I recommend for most accounts
For a lead generation business with clean tracking, I recommend Maximize conversions at launch, then Target CPA once the campaign has a stable month of data. For an online store with accurate revenue tracking, I recommend Maximize conversion value first, then Target ROAS. In both cases, the biggest lever is not the bid strategy itself but the quality of the conversion data it receives. If you only fix one thing this month, make it tracking.
Bidding is one part of a wider job. A Google Ads specialist also manages keywords, search terms, ads, budgets and landing pages, all of which change the data the bidding system learns from. If you run several channels, it also helps to judge Google Ads alongside your other spend, which is the core of performance marketing.
Frequently asked questions
Which Google Ads bidding strategy is best for beginners?
What happened to Enhanced CPC?
Is Target CPA the same as Maximize conversions with a target?
How long should I wait before judging a new bid strategy?
Can a Google Ads specialist choose and manage bidding for me?
Need help choosing the right bid strategy?
If you are not sure your bidding matches your goals or your data, I can help. See my Google Ads management service, or request a free ads audit and I will check your conversion tracking, bid strategies and targets before suggesting any changes.