DV360 Bidding Strategies: A Practical Guide to Winning Auctions Efficiently

Understanding Bidding in Display & Video 360

Bidding is where strategy meets the auction. In Display & Video 360 (DV360), your bidding configuration determines how aggressively you compete for each impression, which inventory you win, and ultimately how efficiently your budget converts into outcomes. Choose the wrong approach and you either overpay for low-value impressions or lose auctions that would have driven results.

This guide breaks down the bidding options available in DV360, when each makes sense, and how to avoid the common mistakes that quietly erode performance.

The Two Broad Categories: Fixed vs. Automated

Every line item in DV360 uses either a fixed bid or an automated bid. The distinction is fundamental.

• Fixed bidding means you set a single bid amount and DV360 bids that value in every eligible auction. You retain full control, but the platform does no optimisation on your behalf.
• Automated bidding hands bid calculation to DV360's algorithms, which adjust bids impression-by-impression based on the likelihood of achieving your chosen goal.

Fixed bidding suits scenarios where predictability matters more than optimisation — for example, guaranteed CPM buys, testing new inventory, or maintaining tight control over spend during a launch. Automated bidding is the default choice once you have enough data and a clear performance goal.

Automated Bidding Strategies Explained

DV360 offers several automated strategies, each aligned to a different objective. Understanding what each one optimises toward is the key to selecting correctly.

Maximise Conversions / Value

These strategies instruct DV360 to spend the full budget while generating as many conversions (or as much conversion value) as possible. They are ideal when you want the algorithm to find efficiency without being constrained by a strict cost target — useful early in a campaign when you're still gathering data.

Target CPA (tCPA)

Target CPA tells DV360 to acquire conversions at an average cost you specify. The algorithm raises bids for high-probability impressions and lowers them for weaker ones, steering the average toward your target.

tCPA works best when:

• You have a reliable conversion signal firing consistently.
• The campaign generates enough conversions to give the algorithm learning data.
• Your target is realistic relative to historical performance.

Set the target too low and delivery collapses; set it too high and you overspend. Move targets gradually — 10–20% adjustments rather than dramatic swings.

Target ROAS (tROAS)

Target ROAS optimises toward a ratio of conversion value to spend, making it the right choice for retail and ecommerce advertisers passing dynamic revenue values back to DV360. It requires clean value tracking; if your conversion values are inaccurate, the algorithm optimises toward the wrong signal.

Maximise Viewable Impressions or CIVA

For upper-funnel and brand campaigns, DV360 can optimise for viewability rather than conversions. Strategies such as maximising viewable impressions or optimising to a viewability target help ensure media is seen rather than merely served — critical for awareness objectives where a conversion signal isn't available.

Bidding Strategy Comparison

Strategy	Best For	Requires Conversion Data	Control Level
Fixed bid	Guaranteed deals, testing, tight control	No	High
Maximise conversions	Early-stage performance, data gathering	Yes	Low
Target CPA	Steady-state acquisition at a known cost	Yes (volume)	Medium
Target ROAS	Ecommerce / value-based goals	Yes (with values)	Medium
Viewability-based	Brand and awareness campaigns	No	Medium

Custom Bidding: The Advanced Lever

Custom bidding is DV360's most powerful — and most underused — capability. Instead of optimising toward a standard goal like conversions, you define a custom impression value using a script or a combination of Google metrics. DV360 then bids toward maximising that value.

Common use cases include:

• Weighted multi-event scoring — valuing add-to-cart, lead form starts and purchases differently in a single algorithm.
• Floodlight-based custom goals — combining several conversion actions with custom weights.
• Proxy signals for hard-to-track outcomes — optimising toward quality engagement when downstream conversions are sparse.

Custom bidding shines when a single out-of-the-box goal doesn't capture your true business value. It does, however, demand careful setup and ongoing validation. If you're weighing whether to build custom algorithms in-house or lean on specialist support, our DV360 managed services team handles exactly this kind of configuration.

Practical Rules for Better Bidding

Regardless of which strategy you choose, a few disciplines consistently separate strong DV360 accounts from underperforming ones.

Give Algorithms Room to Learn

Automated strategies need a learning period. Avoid changing bids, budgets, targeting or creative during the first days after activation or after a major edit. Each significant change resets the algorithm's understanding.

Don't Over-Constrain

Stacking a tight tCPA target on top of narrow audience targeting, restrictive inventory filters and a low frequency cap starves the algorithm of eligible auctions. If delivery stalls, loosen one constraint at a time rather than everything at once.

Match Bidding to Funnel Stage

• Upper funnel: viewability or reach-oriented strategies.
• Mid funnel: maximise conversions to gather signal.
• Lower funnel: Target CPA or Target ROAS once volume supports it.

Watch Your Conversion Signal

Automated bidding is only as good as the data feeding it. Broken Floodlight tags, delayed conversions or inconsistent value passing will all degrade results. Audit tracking before blaming the algorithm.

Use Bid Multipliers Sparingly

DV360 lets you apply bid adjustments by dimensions such as device, day, or user list on fixed-bid line items. These are useful for encoding known preferences, but they conflict with automated bidding — the algorithm already accounts for these factors, so layering manual multipliers usually hurts more than it helps.

A Sensible Rollout Sequence

For a new performance campaign, a pragmatic progression looks like this:

1. Launch with maximise conversions (or a conservative fixed bid) to gather clean data.
2. Stabilise for one to two weeks, letting conversion volume accumulate.
3. Introduce a target — move to Target CPA or ROAS once you have enough conversions and a credible benchmark.
4. Refine targets in small increments, and consider custom bidding once you understand which signals correlate with real business value.

This staged approach avoids the classic error of setting an aggressive target from day one and then troubleshooting why the campaign won't spend.

When to Bring in Specialist Support

Bidding decisions compound. Small misconfigurations across many line items add up to meaningful wasted budget, while a well-tuned bidding framework can materially improve efficiency without extra spend. Teams running DV360 at scale often benefit from a structured review of their bidding logic, conversion setup and custom algorithm design.

If you're deciding between running the platform yourself or getting expert help, explore our full range of DV360 services, or compare the hands-on self-serve account and co-managed options to find the right level of support.

Ready to Optimise Your DV360 Bidding?

Whether you need a bidding audit, help configuring custom algorithms, or a partner to manage optimisation end to end, our team can help you get more from every auction. Get in touch with a DV360 expert to talk through your setup and goals.