Smart Bidding
Automated bidding strategies using Google's machine learning to optimize bids in real time for conversions.
Definition
Smart Bidding is a subset of Google's automated bidding strategies that uses machine learning to optimize bids for conversions or conversion value in every auction. Smart Bidding strategies include Target CPA, Target ROAS, Maximize Conversions, and Maximize Conversion Value. Unlike manual CPC bidding, Smart Bidding considers hundreds of signals — device, location, time, audience, search query, and more — to set the optimal bid for each auction in real time.
The Practitioner's Perspective
Smart Bidding's power comes from the signals it can process that no human bidder could. For every auction, Google's algorithm considers the searcher's device, browser, location, time of day, day of week, the specific query, search history, YouTube history, and dozens of other signals. It then adjusts bids up or down from your base to maximize the probability of a conversion at or below your target cost. This creates bidding precision impossible to replicate manually.
For healthcare accounts, the choice of Smart Bidding strategy depends on your data volume and goals. Maximize Conversions (no target) is the best starting point for new campaigns — it spends your budget to get as many conversions as possible. Once you accumulate 30+ conversions per month, transition to Target CPA (set a target cost per conversion) or Target ROAS (set a revenue-per-dollar target). These goal-based strategies constrain the algorithm to your efficiency targets.
Smart Bidding requires a learning period (typically 2–4 weeks per strategy change) during which performance may fluctuate. Avoid making major changes (bid strategy, budget, targeting) during the learning phase. After the learning period, performance typically stabilizes and improves as the algorithm accumulates more account-specific data. Patience during the learning phase is critical — many advertisers switch strategies too early and restart the learning cycle unnecessarily.
Frequently Asked Questions
Which Smart Bidding strategy should a new healthcare account use?
Start with Maximize Conversions without a target. This gives Google freedom to find conversions within your budget. Once you have 30+ monthly conversions, set a Target CPA based on your actual data. The progression is: Maximize Conversions → Target CPA → Target ROAS (if you can measure revenue).
Can I use manual CPC alongside Smart Bidding?
Not in the same campaign — you choose one bidding strategy per campaign. However, you can run separate campaigns: one with Smart Bidding for your main keywords, one with manual CPC for branded terms where you want predictable spending. Many mature accounts run branded campaigns on manual CPC and non-branded on Smart Bidding.
Why did my Smart Bidding performance drop suddenly?
Common causes: you changed the bid strategy (restarted the learning phase), your conversion tracking broke (Smart Bidding went 'blind'), a competitor significantly increased budgets, or a seasonal shift changed auction dynamics. Check conversion tracking first — it's the most frequent cause of sudden Smart Bidding performance drops.
Related Terms
Put the theory into practice
VortiHQ manages Google Ads for healthcare and aesthetics practices on a performance-based model — you pay us when you close patients, not just when they click.