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The Priority List on Prebid
Ad Optimization

Prebid's Priority List: A Must-Have for Ad Revenue Optimization

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Sandhya Soans
January 20, 2025
January 23, 2025

Given the complexity of efficient ad-serving workflows and revenue optimization, leveraging priority listing in Prebid emerges as a strategic approach. This is particularly beneficial for publishers managing extensive inventory at scale.

Priority listing on Prebid lets you segregate demand sources, through which you can prioritize premium bidders over resellers or lower-value partners. 

This is a great way of optimizing fill rates without compromising on quality! Moreover, this structured approach minimizes redundant bidding attempts, reduces latency, and ensures high-quality ads are delivered seamlessly. 

Specifically in cases when publishers serve billions of impressions – the ability to prioritize is critical to maintaining the operation at scale, improving the user experience, or and driving revenue. 

While Prebid provides basic prioritization tools, optimizing the ad-serving process is essential for achieving greater efficiency and flexibility. Before diving into the specifics of priority listing on Prebid, let’s take a step back and explore how ad serving works and how prioritization fits into the bigger picture.

How Does Ad Serving Work?

Prebid allows you to prioritize certain demands while keeping the flexibility of open bidding. Here’s the process in action:

  1. Bid Requests: The Prebid.js wrapper makes calls to all that demand partners (SSPs, DSPs or direct bidders) that were provided during its configuration. Both partners counter each with offers for the open space.
  2. Bid Responses: They pass back their bids with values that can include more metadata, such as an associated Deal ID or particular targeting parameters suggesting the value or precedence of the bid.
  3. Bid Ranking and Selection: Prioritized classification by rules that are predetermined by the bids – highest CPM, premium Deal ID, and the priority established by the publisher.
  4. Key-Value Passing: The top-ranking bids, especially those with prioritized Deal IDs, are sent to the publisher's ad server (like Google Ad Manager) as key-value pairs for the final ad selection process.
  5. Ad Server Prioritization: The key-value data is used in delivering ads based on the priority configured in the ad server (For example high priority line items associated with high priority bids are delivered first).
  6. Ad Delivery: The selected ad creative is served to the user, ensuring that the high bid slots get premium placements, while low bids fill up the leftovers.

By using this approach, you can manage competing demand sources effectively and ensure that high-priority deals are given the best chance of success.

Step-by-Step Guide to Setting Up a Priority List on Prebid

Prebid priority basically requires configuring your ad server, where you set out a list of demands over the other ones.

  1. Organize: Create advertisers and orders in your ad server (e.g., Google Ad Manager) to structure your line items. 
Google Ad Manager hierarchy

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  1. Define Targets: Define key-value pairs targeting a line item, for example, hb_pb, hb_adid, hb_size, hb_format.
  2. Create Line Items: Create line items for each priority level, make corresponding line items, which will be divided into three levels, high, medium, and low. Also, set targeting criteria according to the key-value pairs you have chosen.
  3. Set Priorities: To help prioritize line items, there must be a set order of priority levels. Those with higher priority; are attended to first.
New line item settings

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  1. Add Creatives: Every line item should be assigned to creatives depending on the requirements of the ad sizes and formats.
  2. Test & Optimize: Run numerous tests on the setup, then, closely observe performance, and changes ought to be made to the ad delivery and the revenue.

In this way you will be able to control your ad inventory and increase your monetary value stream by having an organized and prioritized Prebid list.

Priority List on Prebid: More Than A Tool For Bidding Management

The Priority List on Prebid isn't just a tool for bidding management—it's a strategic framework that can significantly elevate your programmatic advertising. If you aim to optimize ad revenue and long-term engagement, the Priority List is essential. 

By offering granular control over how bids are managed and prioritized, the Priority List ensures that your inventory is allocated with precision, aligning every impression with your business objectives. 

Here's why this feature is a must-have for any high-performance header bidding setup:

Key Benefits of the Priority List in Prebid

1. Optimizing Bid Management with Precision

Prebid's Priority List offers sophisticated control over which demand partners participate in your auctions, empowering you to optimize your inventory by ranking bidders based on performance, business goals, or other critical KPIs. This prioritization ensures that high-value partners get first access, maximizing potential revenue.

By directing bids from top-tier demand sources to the front of the queue, publishers can strategically allocate impressions to those with the highest value. This isn't just about getting the highest CPM—it’s about getting the right CPM, from the right partners, at the right time.

2. Revenue Optimization Through User Behavior Insights

As user behavior evolves, so should your approach to monetization. For instance, users frequently transition between email and website content, often treating email as a menu for navigation. These brief but high-engagement sessions represent a prime opportunity for monetization, where first impressions are key. 

The Priority List allows you to deliver the highest-value ads during these high-engagement moments, optimizing revenue without overhauling your existing setup.

By analyzing user behavior in real time, you as a publisher can make smart decisions about ad formats and placements. 

Should ads refresh every 30 seconds to capture fleeting interest, or should you optimize for click-based interactions? The Priority List, combined with behavioral insights, ensures that your header bidding is always aligned with the most profitable opportunities, balancing short-term monetization with long-term engagement goals.

3. Premium Priority Deals (PPD): Focusing on Quality Over Quantity

The Priority List on Prebid supports premium demand sources through Premium Priority Deals (PPD), emphasizing quality over sheer volume. 

PPDs give top-tier partners direct access to premium inventory, ensuring that you aren’t simply maximizing bids but elevating the entire user experience by serving ads from trusted, high-quality brands.

With PPDs, you are not just optimizing for immediate revenue. You are aligning your monetization strategy with long-term brand integrity, ensuring that users are consistently served the most relevant and impactful ads.

4. Identity Solutions: Navigating a Post-Cookie World

The decline of third-party cookies has created challenges in tracking user behavior across websites. However, this shift opens up new opportunities for identity-based ad targeting. 

Leverage first-party data and identity signals to help prioritize bids based on verified user information, allowing you to deliver more relevant ads to your audience.

By utilizing identity solutions effectively, publishers can prioritize bids from advertisers who can better match users' interests, thus improving engagement and maximizing revenue opportunities in a cookieless environment.

5. Traffic Shaping: Maximizing Operational Efficiency

Traffic shaping through the Priority List enables publishers to prioritize high-value transactions by optimizing which ad requests are sent to which bidders. 

By directly targeting the most impactful ad requests—based on historical performance, user engagement, and bid value—you can streamline the auction flow, and improve revenue generation along with operational efficiency.

6. Minimizing Latency, Maximizing Impact

In a high-performance bidding environment, reducing latency is critical. By structuring your Priority List on Prebid effectively, you can minimize unnecessary auction delays, speeding up the process and enhancing the user experience. 

A more efficient bidding process not only boosts monetization potential but also helps reduce friction for users, keeping them engaged and encouraging more interactions with your site.

Use Cases for the Priority List in Prebid

Use Case 1: Optimizing Auction Efficiency with Priority Lists on Prebid

Scenario: In programmatic advertising, the sheer number of bidders participating in auctions can create inefficiencies. Without a priority mechanism, the system attempts to process all bidders equally, which may lead to delays or unoptimized bid selection.

Solution: A priority list in Prebid ensures that top-performing partners, such as Magnite, Amazon, or ADX, are evaluated first, streamlining the auction process. By processing high-performing partners first, publishers can reduce latency and improve the overall auction efficiency, particularly in environments with limited time for bid response.

Highlights:

  • Improved Latency: By focusing on high-priority bidders, the auction concludes faster, reducing the risk of timeouts.
  • Enhanced Revenue Potential: Prioritizing top bidders increases the likelihood of receiving competitive bids, boosting CPMs and fill rates.
  • Resource Allocation: Minimizes server load by reducing unnecessary processing for low-performing bidders.

Use Case 2: Maximizing Revenue Through Dynamic Floor Adjustments

Scenario: Dynamic floor pricing is a key component of modern programmatic auctions. By creating a priority list, publishers can ensure that dynamic floor adjustments are applied more effectively to high-value bidders like Amazon and Prebid partners.

Solution: Priority lists enable publishers to focus floor-setting strategies on partners capable of adjusting bids in real time, ensuring that dynamic pricing delivers maximum revenue impact. This structured approach prevents wasted opportunities and ensures competitiveness among bidders.

Highlights:

  • Revenue Optimization: Ensures high-priority bidders consistently compete for inventory at competitive price points, driving up RPM and CPM values.
  • Improved Bid Insights: A priority mechanism provides clearer insights into how specific bidders react to dynamic floor changes, enabling further optimization.
  • Adaptive Bidding Strategy: High-priority bidders can be targeted with precise floor values to maximize their competitive advantage.

Use Case 3: Beyond Prebid - Enhancing Holistic Auction Strategies

Scenario: In a holistic auction setup, multiple bidding environments (e.g., Prebid, Open Bidding, ADX) compete simultaneously for impressions. A priority list enables publishers to rank these environments based on historical performance metrics, ensuring optimal revenue outcomes.

Solution: However, ranking high-value bidders in priority buckets guarantees auctions do not compromise overall competition while favoring the best-demand sources. Programmatic and direct sell are the ways that many publishers separate their inventory; this approach is useful to distribute impressions properly.

Benefits:

  • Improved Demand Segmentation: It is possible to categorize demand sources using specified performance criteria like CPM lift, fill rates and bid density into different tiers. It means that competition within the tiers is allowed and possible while at the same time there is balance between players across the ecosystem.
  • Higher Holistic Yield: Ensure Prebid, Amazon TAM and ADX demand sources are aligned in a competitive structure to work in parallel. This maximizes each tier and makes sure the premium inventories get the best treatment.
  • Performance Tracking: Easier to measure key metrics (e.g., CPM lift, RPM uplift) per priority group, providing actionable insights for optimization.

It’s time to give your ad operations a competitive edge. Add the Priority List—whether within Prebid or as part of a broader holistic auction strategy—and take full control of your inventory today!

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