Bidding Strategies

Enhanced CPC vs Portfolio Bid Strategies: Per Campaign or Shared

In short: Enhanced CPC was a per campaign setting that scaled your manual bids, now retired on Search and Display. Portfolio bid strategies are account level automated strategies shared across campaigns, pooling their conversion data against one target. Portfolios cover the automated strategies, so nothing in them preserves an eCPC style multiplier on your own bid.

By the AdFlint research team · Fact-checked against current Google and Meta platform behavior · Last reviewed July 2026

Enhanced CPC

Legacy Google setting that raised or lowered manual bids at auction time based on conversion likelihood, now retired for Search and Display.

eCPC sat between manual and fully automated bidding, nudging your max CPC on each auction. Google wound it down and moved Search and Display campaigns onto Manual CPC, so campaigns still labeled eCPC in older exports no longer receive the adjustment. If a strategy document still references it, the current equivalent is Maximize Conversions with or without a target CPA, not a manual bid with a multiplier.

Full definition

Portfolio Bid Strategies

Google bid strategies stored at account level and shared across multiple campaigns, ad groups, or keywords working toward one common goal.

Rather than each campaign optimizing alone, a portfolio pools their conversion data and balances spend against the shared target, with optional bid limits and spend targets. It helps when individual campaigns are too small to learn on their own, or when you manage a group of campaigns against one blended CPA. The catch is losing per-campaign control, because the strategy can starve one campaign to fund another.

Full definition

Side by side.

The differences that actually change what happens in your account.

 Enhanced CPCPortfolio Bid Strategies
Status todayRetired for Search and Display.Live, covering the automated strategies.
ScopeOne campaign at a time.Multiple campaigns under one shared strategy.
Data usedThat campaign's conversion signals, applied as a bid multiplier.Pooled conversion data from every member campaign.
Bid ownershipYours, scaled by Google.Google's, bounded by optional bid limits.
Spend allocationFixed by each campaign's own budget and bids.Can concentrate in whichever member campaign performs best.
MigrationMove to Maximize Conversions, then pool into a portfolio if data is thin.Already the destination.

What actually separates them.

01

eCPC operated on one campaign's bids, while a portfolio manages several campaigns against a single blended target.

02

Portfolios apply to automated strategies, so joining one means abandoning manual bids rather than layering a multiplier on them.

03

Pooling is the reason to use a portfolio: small campaigns that could not learn alone can price auctions together, which eCPC never addressed.

04

Portfolio bid limits cap what the bidder may pay but do not set the price, so they are a ceiling rather than the eCPC style multiplier on your number.

05

A portfolio can starve one campaign to fund another, a spend redistribution eCPC campaigns never experienced because each stood on its own budget.

Which one should you use?

Use Enhanced CPC when

  • Reading performance from before the wind-down.
  • Auditing documentation or dashboards that still specify eCPC.
  • Explaining a bid strategy label that changed with no account edit.
  • There is no live setting to select.

Use Portfolio Bid Strategies when

  • Several campaigns each too small to support their own learning.
  • A group of campaigns judged against one blended cost or return goal.
  • You want bid limits applied consistently across many campaigns at once.
  • Shifting delivery toward the best performing member campaign is acceptable.

Common questions.

Can I recreate eCPC behavior inside a portfolio strategy?

No. Portfolios wrap automated strategies, which set the whole bid rather than scaling yours. The closest control is a bid limit, which caps the price but does not anchor it to a number you chose per keyword. If bid ownership is the requirement, the honest answer is Manual CPC on a standalone campaign.

Should migrated eCPC campaigns go straight into a portfolio?

Only if they are individually too small to learn. A campaign with steady conversions is usually better on its own Maximize Conversions strategy, where targets and diagnostics stay campaign specific. Pool when thin data is the actual problem, not as a default, because pooling costs you per campaign control in exchange.

How do I tell if pooling is helping or hiding a problem?

Segment by campaign rather than reading the portfolio total. A shared target is met on average, so one member can be delivering almost nothing while the group looks healthy. Check impression share lost to budget and rank per campaign, and confirm that the quiet campaign is quiet because it earns less, not because it was starved.

Or stop choosing between them.

AdFlint picks the setting, writes the ads, and keeps optimizing inside the Google and Meta accounts you already own.

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