Google Ads Bidding in 2026: Target CPA vs Target ROAS vs Max Conversions

Question 1

Should I use Smart Bidding or manual CPC in 2026?

Accepted Answer

According to the article, Smart Bidding outperforms manual CPC in most scenarios in 2026 when conversion tracking is accurate and complete, conversion volume is sufficient, and campaign structure and targeting are sound. The article states manual CPC reduces thousands of daily auctions varying by device, location, time of day and other signals to a single static number per keyword. When those three conditions are in place, auction-time bidding can distinguish likely converters and bid accordingly thousands of times per day.

Question 2

When should I use Target CPA vs Max Conversions?

Accepted Answer

The article recommends Max Conversions for new campaigns with limited data, fixed budgets where volume is the goal, or a data-gathering phase before transitioning to Target CPA. It recommends Target CPA for established campaigns with at least 15 to 30 conversions per month and a clear target tied to unit economics. The critical distinction is that Max Conversions will spend the full daily budget — for example $200/day even if only $100 of good conversions exist — while Target CPA adds a cost constraint.

Question 3

How should I set my initial Target CPA without killing performance?

Accepted Answer

The article recommends basing initial Target CPA on actual historical cost per conversion from the last 30 to 60 days, not an aspirational goal. Step 1 is to pull average CPA, Step 2 is to set initial tCPA at or slightly above it, going 10 to 20 percent above historical average to allow learning, and Step 3 is to lower tCPA in increments of 10 to 15 percent every two weeks after performance stabilizes. Setting tCPA too low on day one restricts auction entry and creates a downward spiral of fewer impressions, clicks and conversions.

Question 4

How much conversion volume do I need before switching to Target ROAS?

Accepted Answer

According to the article, Target ROAS requires more data than Target CPA because it must learn which conversion types produce higher versus lower revenue. While Google’s official recommendation is a minimum of 15 conversions over 30 days, the article states tROAS performs best with significantly more, and accounts with fewer than 30 to 50 conversions per month with variable values often see erratic performance. Below that threshold, the article recommends starting with Max Conversion Value or staying with Target CPA until a larger dataset is built.

Question 5

What should I leave alone during the Google Ads learning period?

Accepted Answer

The article states the learning period typically lasts one to two weeks after a significant change to bidding strategy, budget or conversion action, and performance fluctuation during it is normal. It advises not changing bid targets, budgets, conversion actions or campaign structure during learning, because every change resets learning. It advises monitoring search term reports, geographic performance, device splits and audience signals during learning to inform strategic changes after the period ends.