aChannel prioritization is a Google Ads setting that lets an advertiser rank the inventory sources inside a campaign as either high or low priority. The system spends on high-priority channels first and passes whatever budget remains to the low-priority ones. Google introduced it on October 14, 2026, alongside a companion control called budget allocation, which caps a low-priority channel at a percentage of the campaign's average daily budget. The pair exist because advertisers had, for most of the past decade, faced a binary choice about networks such as Search partners and the Google Display Network: accept them in full or switch them off. Tal Akabas, director of product management at Google Ads, put it plainly: "These features give marketers more control than all-or-nothing opt-outs."

How the tiers work

Every channel starts at High priority by default. An advertiser moves a channel down to Low priority when it is worth buying, but only after the core inventory has been funded. Which channels can be ranked depends on the campaign type, according to Google's help centre:

  • Search: Google Search, Search partners and the Google Display Network (GDN), each ranked separately.
  • Shopping: Google Search and Search partners.
  • Performance Max: "Google channels", Search partners and the GDN.
  • Demand Gen: "Google channels" and the GDN.

The grouping matters. In Performance Max and Demand Gen, Search, YouTube, Maps, Gmail and Discover are bundled into a single "Google channels" tier. An advertiser cannot put YouTube below Search inside a Performance Max campaign. The controls rank Google's own properties against third-party supply, not against each other.

An account-level "Channel Prioritization" card sets a default for each campaign type, which individual campaigns can override. Manager accounts cannot set priorities; each client account must be configured on its own. At launch the controls were available in the Google Ads interface and in Search Ads 360.

Where it bites: bidding and budget limits

Channel prioritization is a budgeting control rather than a bidding control. Ginny Marvin, Google's Ads Product Liaison, made that distinction explicit in an October 16 newsletter, writing that "the system will fully fund your high priority channels first." The practical effect therefore depends on whether a campaign runs out of money.

Google's help page sets out three cases. For campaigns on Target cost per acquisition (CPA), Target return on ad spend (ROAS) or Target cost per click (CPC) that are not limited by budget, prioritization "generally" does not change how spend is distributed, because the bidding system already buys every auction that meets the target. For the same strategies when budget-limited, high-priority channels spend first within the target, and overflow moves to low-priority channels only when it can still hit the target. For Maximize Conversions, Maximize Conversion Value, Maximize Clicks, Manual CPC and Target Impression Share, high-priority channels spend first and any remaining budget flows down.

That first case explains why budget allocation exists. A Target ROAS campaign with ample budget would see little difference from a priority label. A percentage cap, by contrast, applies regardless.

Budget allocation: the percentage cap

Budget allocation is optional and available only on channels already marked low priority. It is calculated against the average daily budget, not actual spend. Google's own example: a 5% allocation on a $1,000 average daily budget targets roughly $50 a day on that channel. Allocations reset daily, and unspent or overspent amounts do not carry over. Setting the figure to 0% means Google will not spend on the channel.

A worked example shows the interaction. A $1,000 Search campaign on Maximize Conversions could hold Google Search at high priority, Search partners at low priority capped at 5%, and the GDN at low priority capped at 10%. If Google Search absorbs $900 of the day's eligible auctions, the remaining $100 can flow to the low tier, with Search partners aiming for no more than about $50 and Display no more than about $100. If Google Search can absorb the full $1,000, the low tier receives nothing.

The caps carry a significant caveat. Google describes them as "best-effort" and warns that "this isn't a guarantee, and daily spend on that channel may occasionally exceed your budget allocation." Budget allocation is not supported for Demand Gen at all, according to the help page.

Shared budgets are treated as one pool. The allocation applies "across all campaigns that use it", and the linked campaigns must be of the same type for the settings to take effect. Campaign total budgets, which run for a fixed period of days, are compatible only with Demand Gen.

Origin and evolution

The problem the control addresses is old. Google's search partner network dates from its May 2002 deal with AOL, and the option to let Search campaigns show ads on the Display Network arrived with "Search Network with Display Select" in November 2013, later known as Display expansion. Both were on-or-off checkboxes in Search and mandatory in Performance Max.

In November 2023, Adalytics estimated that the Search partner network generated about $10.5 billion a year for Google and said it found Google's search code on more than 80,000 sites. Intelligency Group found in June 2025 that Search partner placements returned 37% lower ROAS than Google Search. Google responded with incremental fixes, including site-level placement reporting for Search partners in August 2025 and the removal of parked domains on February 10, 2026.

Demand Gen moved first on channel choice, gaining independent on-off controls for YouTube, Discover, Gmail and Display from March 2025. Performance Max followed through a series of tests. On April 30, 2026, a "Partners" setting appeared in a Performance Max alpha, with checkboxes for Search partners and Display. By July, Google confirmed to Digiday that a limited group of advertisers could switch both off, calling it "a pilot with a limited group of advertisers." On August 26, a different design surfaced: a channel prioritization slider in a Performance Max alpha that raised or lowered the CPA target per channel across seven surfaces. The shipped product discarded per-channel targets in favour of two tiers and a cap.

The October 14 launch set out the four campaign types and the percentage mechanics. Rollout began progressively on October 15.

Why it matters for advertisers

The control changes the economics of networks that many accounts had simply switched off. A Search partner tier capped at 5% turns an unknown risk into a bounded test.

It also arrives after a summer bidding change. From August 17, Google began pulling budget-capped Target CPA and Target ROAS campaigns back up towards their targets rather than letting them run below. Budget-limited campaigns are where prioritization has most effect. PPC Land has argued that the platform holds most of the dials and that Google optimises its own revenue while advertisers must optimise theirs; channel prioritization is one of the few recent changes that returns a dial.

For Search campaigns using Display expansion, the setting is not optional in the long run. From February 2027 those campaigns migrate automatically, and Google says the current spend allocation setup "will go away." To approximate today's behaviour, Google recommends setting the GDN to low priority with a 50% allocation. Display will also stop serving on Search campaigns using Target Impression Share.

Limitations and disputes

The best-effort wording is the most criticised feature. A cap that "may occasionally" be exceeded is a guideline, and Google has not said by how much or how often. Display expansion's current split has never been documented either, a gap noted in PPC Land's launch coverage, so advertisers cannot tell whether the suggested 50% truly preserves the status quo.

The bundling of Google channels limits the tool's reach. Performance Max advertisers can push third-party supply down, but cannot separate YouTube from Search. Performance Max also offers no individual channel opt-outs, unlike Search and Demand Gen.

Google's own sources disagree on several points. The help page says Google Ads API and Editor support is "coming soon"; Marvin wrote that the controls "are supported via the Google Ads API at launch, with Google Ads Editor support coming soon." Marvin also called the settings "fully compatible" with shared budgets, where the help page imposes restrictions. Marvin's rollout guidance said "months" on LinkedIn and "weeks" on X. Akabas suggested on a podcast that Demand Gen advertisers could test Display with "a budget allocation", which the help page excludes.

What it is not

Network opt-outs. The existing checkboxes for Search partners and the Display Network in Search campaigns remain. Marvin confirmed that "existing opt-in/opt-out settings for the Display Network and Search partners are unchanged." An opt-out removes a channel; prioritization ranks it.

Budget allocation. Often used interchangeably, but it is the companion cap, available only on low-priority channels. Prioritization sets order; allocation sets a ceiling.

Placement controls on Meta. Meta has replaced manual placement selection with value rules that can cut bids by at most 90%. That is a bid adjustment by placement, not a budget order.

Media-planning prioritization. Outside Google Ads, the phrase also describes choosing which marketing channels, such as search, social or television, receive investment. That is a planning exercise, not a platform setting.

Recent developments

Two days after launch, Marvin confirmed that Performance Max advertisers can set Search partner spend to 0%, in effect giving every Performance Max account the opt-out that the July alpha had rationed. She also called the controls "budgeting controls and not bidding controls." As of October 25, 2026, availability still varies by account, and the next fixed date is the February 2027 Display migration.

Timeline

  • May 2002: Google signs its search syndication deal with AOL, the foundation of the Search partner network
  • November 2013: Google launches Search Network with Display Select, later called Display expansion
  • November 2023: Adalytics estimates Search partners generate about $10.5 billion a year for Google
  • March 2025: Demand Gen campaigns gain independent channel on-off controls
  • June 2025: Intelligency Group reports Search partner ROAS 37% below Google Search
  • August 2025: Google adds site-level placement reporting for Search partners
  • February 10, 2026: Parked domains removed from the Search partner network
  • April 30, 2026: "Partners" network setting spotted in a Performance Max alpha
  • July 2026: Google confirms a limited Performance Max pilot to switch off Search partners and Display
  • August 17, 2026: Budget-capped Target CPA and Target ROAS campaigns begin pacing back toward targets
  • August 26, 2026: Performance Max channel prioritization slider spotted in alpha
  • October 14, 2026: Google announces channel prioritization and budget allocation
  • October 15, 2026: Progressive rollout begins for Search, Shopping, Performance Max and Demand Gen
  • October 16, 2026: Ginny Marvin confirms 0% Search partner allocation in Performance Max
  • February 2027: Search campaigns with Display expansion migrate to the new controls

Summary

Who: Google Ads introduced the control, announced by Tal Akabas, director of product management, and explained by Ads Product Liaison Ginny Marvin. It is used by advertisers running Search, Shopping, Performance Max and Demand Gen campaigns, and it governs spend on Google-owned surfaces, Search partners and the Google Display Network.

What: A setting that ranks channels within a campaign as high or low priority, funding high-priority channels first, with an optional best-effort percentage cap on low-priority channels.

When: Announced October 14, 2026, with progressive rollout from October 15, 2026. Search campaigns with Display expansion migrate automatically from February 2027.

Where: In the Google Ads interface and Search Ads 360, at the account, shared budget or campaign level; not in manager accounts. Google Ads Editor support is pending, and API support is disputed between Google's sources.

Why: To replace all-or-nothing network opt-outs with graded controls, after years of advertiser complaints about Search partner and Display spend quality.