AI Skills Marketplace / Paid Media

Cross-Platform Audience Overlap Auditor

The Cross-Platform Audience Overlap Auditor is a free Claude Skill that finds an account bidding against itself: campaigns with real, measurable audience-signal overlap that are not deliberately exclusion-linked, whether within one platform (PMax vs Search) or across platforms.

↗ View Source ⬇ Download Full Repo (.zip)
MIT
License
1 function
Decision branches
exclusion-aware overlap detection
Escalation rules
Yes
Multi-tool support
Aug 17, 2026
Last updated
12/12 passing
Tests
README.md View raw ↗

What this is (and isn’t)

A set-overlap function over campaign data you supply, not a hosted service or a live ad-platform integration.

Files

FilePurpose
auditor.jsfindAudienceOverlaps(), plus exported jaccardSimilarity() — zero dependencies
test.js12-test suite covering same-platform, cross-platform, and exclusion-respecting cases
SKILL.mdFull skill definition, loadable in Claude Code/Desktop

Why exclusion-awareness matters

A PMax campaign and a Search campaign sharing the same remarketing list is often intentional, if one explicitly excludes the other’s audience. This skill checks exclusion relationships on both sides before flagging, surfacing real, unaddressed self-competition rather than every deliberate overlap in the account.

FAQ

Is this skill free to use?

Yes. Free to download and run yourself. MV3 charges $175/hr only for implementation help pulling your real audience-signal data from Google Ads, Meta, and LinkedIn.

Does this only work within one platform?

No. It flags overlap both within a single platform (PMax vs Search) and across platforms when the same audience list (e.g. an uploaded customer list) is shared.

How does it avoid false positives?

It explicitly checks for deliberate audience exclusions configured between campaigns before flagging an overlap as a real problem.

Does my campaign data get sent to MV3?

No. The overlap analysis runs entirely in your own environment.

What counts as an "audience signal"?

Any identifier for a targeting input, remarketing list IDs, custom audience segment IDs, in-market audience categories, or uploaded customer list IDs.

JR
Jordan Reeves
ABM & Outbound Pipeline, MV3 Marketing