Google Ads smart bidding strategies — Target CPA, Maximize Conversion Value, Target ROAS — only outperform manual CPC when the conversion data pipeline is clean, fast, and voluminous. Feed the algorithm lies and it optimizes for fiction.
The Conversion Data Feedback Loop
Smart Bidding requires 30–50 conversions per month per campaign to exit learning phase. Each conversion event must fire within seconds of the user action, carry accurate value data, and deduplicate correctly. WordPress sites with delayed form plugins and double-fired analytics tags poison this loop.
Smart Bidding Feedback Loop
Clean conversion data → faster algorithm learning → lower CPA within 30–45 days.
Conversion signal quality over 6 weeks
Maximize Conversion Value for B2B
Assign dynamic conversion values: contact form = R500, phone call >60s = R1,500, qualified meeting booked = R5,000, closed deal imported from CRM = actual contract value. This teaches the algorithm to find users who progress through your 60–90 day B2B sales cycle — not just form fillers.
When Manual Bidding Still Wins
- New accounts with <15 conversions/month per campaign
- Hyper-niche industrial keywords with <50 monthly searches
- Brand defense campaigns requiring exact bid control