Bid Strategy
Paid MediaAlso: Bidding Strategy · Smart Bidding · Automated Bidding
Quick definition
A bid strategy is the method you use to set how much you're willing to pay for a click, impression or conversion in a paid advertising campaign. Strategies range from fully manual (you set each bid yourself) to fully automated (the platform's algorithm adjusts bids in real time based on conversion probability). Automated strategies like Target CPA and Target ROAS use machine learning to optimise bids, but require sufficient conversion data to function properly.
How it varies across Australia
Google's Smart Bidding (Target CPA, Target ROAS) outperforms manual bidding for accounts with sufficient conversion data, typically 30-50 conversions per month at the campaign level. Australian accounts with fewer conversions often see better results with manual or enhanced CPC bidding while building conversion history.
See acquisition performance benchmarks →Automated bidding that optimises bids to achieve a target cost-per-acquisition. The algorithm adjusts bids in real time based on conversion probability. Requires conversion tracking and a minimum volume of conversions to learn effectively.
Automated bidding that optimises for revenue return on ad spend. Requires conversion value data in Google Ads. Best suited for ecommerce with varied product values.
Automated bidding that tries to get as many conversions as possible within your budget. No explicit CPA target. Good for campaigns in the data collection phase.
You set the maximum bid for each keyword or ad group yourself. Requires active management but gives full control. Best when conversion volume is too low for smart bidding to work reliably.
What it actually means
Bid strategy determines how you compete in the ad auction. Manual strategies give you complete control: you set a maximum CPC for each keyword and the platform bids up to that amount. Automated strategies hand control to the platform's machine learning, which adjusts bids hundreds of times per day based on contextual signals.
The appeal of automated bidding is real: a machine can process signals that a human can't. The time of day, the user's device, their recent search history, their location and dozens of other factors all influence purchase probability. Smart Bidding incorporates all of these. Manual bidding can't.
But Smart Bidding's effectiveness is entirely dependent on conversion data. The algorithm learns what a conversion looks like from your historical conversion events. If you have 10 conversions per month, the algorithm is learning from too little signal and will make poor decisions. If you have 50 conversions per month, it has enough signal to optimise effectively.
The practical sequence for most Australian accounts: start with Manual CPC or Enhanced CPC while building conversion history, switch to Maximise Conversions once you have 30+ monthly conversions, then graduate to Target CPA or Target ROAS once you have stable conversion data and a clear target.
Smart bidding is only as smart as the conversion data you feed it.
How it shows up
Bid strategy performance shows up in your cost-per-conversion trend, impression share and average position. When switching from manual to automated bidding, you'll see a learning period of 1-2 weeks where performance may be volatile. Don't evaluate the new strategy until after the learning period ends.
The Australian context
Australian Google Ads accounts often have lower conversion volumes than equivalent-size businesses in the US, because the addressable market is smaller. This means Smart Bidding's minimum data thresholds are harder to reach and the learning periods take longer. Australian accounts in niche B2B categories may find Manual CPC delivers more consistent results than automated strategies even at significant spend levels.
Where people get this wrong
Related terms
Common questions
When should I use Smart Bidding vs manual bidding?
Use Smart Bidding when you have at least 30-50 conversions per month at the campaign level and reliable conversion tracking. Use manual CPC or enhanced CPC when conversion volume is too low for Smart Bidding to learn effectively. The sequence is: manual to build data, then automated once data exists.
What is Target CPA bidding?
Target CPA is a Google Ads Smart Bidding strategy that automatically sets bids to help you get as many conversions as possible at your specified target cost-per-acquisition. It adjusts bids in real time based on conversion probability signals. Works best with 50+ monthly conversions and accurate conversion tracking.
How long does Smart Bidding take to start working?
Smart Bidding has a learning period of 1-2 weeks after any strategy change. Performance may be volatile during this time. Don't evaluate or modify the strategy until the learning period ends. The symbol in Google Ads shows when a campaign is in the learning phase.
Keep exploring
About New Rebellion
New Rebellion is a marketing intelligence consultancy. We build tools, score Australian businesses on how their marketing actually performs, and publish Debrief every day. This dictionary is part of how we work in the open.
How we think →