Blended Cost per Search: Cross-Platform Search Efficiency

Blended Cost per Search measures how much you spend across all ad platforms to generate one on-site search event.

Formula

Formula Components

Metric	Definition
Blended Spend	Total advertising spend across all connected ad platforms
Blended Searches	Total on-site search events attributed across all ad platforms

Metadata
Type	Currency
Data Source	Meta Ads, Google Ads, TikTok Ads
Aggregation	Ratio

Metric	Value
Blended Spend	$5,000
Blended Searches	2,500
Blended Cost per Search	$2.00

Metric

Value

Blended Spend

$5,000

Blended Searches

2,500

Blended Cost per Search

$2.00

How It Works

Blended Cost per Search divides your total advertising spend across Meta, Google, and TikTok by the total on-site search events attributed to those platforms. This gives you a unified view of how efficiently your combined ad spend drives product discovery behavior, regardless of which platform generated the search.

When to Use

Scenario	Action
Budget allocation	Compare blended cost per search against platform-specific costs to identify efficiency gaps
Funnel optimization	Track how cost per search changes relative to cost per add-to-cart or purchase
Campaign scaling	Monitor if increased spend maintains efficient cost per search event
Landing page evaluation	High cost per search may indicate visitors are struggling to find products

Related Metrics

Metric	Relationship
Blended Spend	Numerator — total ad spend across platforms
Blended Searches	Denominator — total search events across platforms
Blended Cost per View Content	Downstream efficiency — cost to drive product page views
Blended CPA	Conversion efficiency — cost per attributed conversion

METRICS

Blended Cost per Search: Cross-Platform Search Efficiency

Formula

Formula Components

Example

How It Works

When to Use

​Formula

​Formula Components

​Example

​How It Works

​When to Use

​Related Metrics

Formula

Formula Components

Example

How It Works

When to Use

Related Metrics