How to Choose a Bidding Strategy? Target CPA, Target ROAS and Maximize Conversions Compared

Choosing a bidding strategy in Google Ads is a far more critical decision than most small business owners realize. There is no single "best" answer — the right strategy depends on your campaign's maturity, the volume of conversion data you have, and your monthly budget. Stick with the wrong strategy and you will either burn your entire budget on low-quality clicks or watch your campaign grind to a halt.

The Three Strategies in Plain Language

• Maximize Conversions: Google spends your entire budget to get as many conversions as possible. It does not control cost; it maximizes volume.
• Target CPA (Cost Per Acquisition): You tell Google how much you want to pay per conversion, and it bids to stay within that limit — even if budget remains unspent.
• Target ROAS (Return on Ad Spend): You specify how much revenue you want for every currency unit spent. This strategy requires both sufficient conversion data and revenue tracking.

Which Strategy Should You Use — and When?

• New campaign, zero conversions → Start with Maximize Clicks or Manual CPC to accumulate data.
• 0-30 conversions per month → Use Maximize Conversions without a Target CPA cap; let the system learn.
• 30-50 conversions per month → Switch to Target CPA, but start roughly 10-15% above your actual average cost.
• 50+ conversions per month with revenue data → Target ROAS is worth considering.
• E-commerce + 50+ monthly conversions → Prefer Target ROAS or Maximize Conversion Value.

Real Scenario: How a Service Business Transitions to Target CPA

Say you run a small service company getting around 40 form submissions per month at roughly 200 TL each. Instead of setting a 200 TL target right away, follow these steps: First, run Maximize Conversions until you have 30 conversions. Then switch to Target CPA with a 220 TL goal — just above your real average. Do not touch the campaign for four weeks; let the learning phase complete. Once results stabilize, gradually work the target down toward 200 TL, moving no more than 15-20% at a time. Moving faster forces the system back into a learning phase.

The Learning Phase: The Period That Demands the Most Patience

When you change strategies, Google spends roughly 7 days adapting to the new conditions. If you change your budget, ad copy, or targets during this window, the clock resets. A learning phase lasting more than two weeks is a red flag — check your conversion tracking tag. Since March 2025, Enhanced CPC (eCPC) has been retired; if you were still using it, your campaign may have been automatically moved to Manual CPC.

Your Conversion Settings Directly Affect Your Strategy

As of 2026, Google splits conversion actions in your account into two groups: primary and secondary. Primary conversions — purchases, qualified forms, phone calls — directly guide the bidding strategy. Lighter signals like add-to-cart or page views should be marked as secondary (observation only). More than three primary conversion actions sends conflicting signals to Smart Bidding and leads to inconsistent performance. A clean conversion setup comes before strategy selection.