Keyword Cannibalization: How Your PPC Campaigns Compete Against Themselves

When PPC campaigns unknowingly compete against each other, costs rise and conversions stall. This episode breaks down keyword cannibalization — what causes it, how to spot it, and the practical fixes that restore campaign efficiency.

Show Notes

Keyword cannibalization is one of the most common — and most overlooked — problems in paid search. When multiple campaigns within the same account compete for the same queries, locations, or clicks, performance quietly deteriorates: cost-per-click climbs, conversions plateau, and budget gets stretched across campaigns that are essentially duplicating each other's work. This episode of PPC.co digs into the full picture of how cannibalization happens and, more importantly, how to fix it. The discussion is drawn from this in-depth guide to keyword cannibalization on the PPC.co blog.

Here's what the episode covers:

• Google's internal auction: Before your ad ever faces a competitor, Google runs an auction inside your own account — and if two of your campaigns are eligible for the same query, they split impressions, divide clicks, and erode each other's authority.
• Keyword overlap: The most common form of cannibalization, often caused by broad match campaigns accidentally triggering alongside exact match ad groups — solvable through tighter keyword organization and strategic negative keyword cross-application.
• Geographic overlap: Running a national campaign and a city-level campaign without location exclusions means two of your ads compete for users in the same place — a structural fix that requires auditing radius settings and excluding locations deliberately.
• PPC vs. SEO overlap: Paying for clicks on keywords where you already rank organically isn't always wrong, but it should always be intentional. Google Search Console data can help you decide whether paid spend is genuinely additive or simply redundant.
• Actionable diagnostics: The Search Terms report in Google Ads is the starting point for spotting overlap; pausing paid ads on organically ranking keywords and running controlled experiments reveals whether the spend is earning its keep. For those running a free PPC audit, cannibalization is often one of the first structural issues uncovered.
• Structural discipline as the fix: Tightening match types, layering negatives into Dynamic Search Ad campaigns, consolidating landing pages, and avoiding redundant close variants are the unglamorous — but high-impact — habits that keep accounts clean.

The episode closes with a reminder that cannibalization isn't a sign of bad ads — it's a sign of campaigns that have grown without enough structure. Fixing it lowers CPC, lifts conversions, and improves overall ROI without requiring a new ad format or bidding experiment. For more on capturing search traffic efficiently, check out the episode Dynamic Search Ads for Beginners: Capture Traffic You Didn't Know You Were Missing.

PPC.co

What is PPC.co?

Paid search and paid social judged on profit rather than platform dashboards. Bidding structure, account architecture, creative testing, incrementality, audience strategy, and the budget conversations that decide whether a channel survives the quarter.

Every episode takes a single decision a paid media manager is weighing — consolidate campaigns or split them, trust the platform's attribution or not, kill a channel or fund it properly — and reasons it out loud. It's written for the person who has to defend the spend, not the person who read a case study about it. Five or six minutes an episode. No guest interviews, no vendor pitches.

Topics include account structure and campaign consolidation, smart bidding and where it misleads, creative testing cadence, audience and exclusion strategy, incrementality and geo tests, landing page alignment, budget pacing, and defending spend to finance.

Produced by PPC.co, paid search and PPC management. Full details, services and further reading at https://ppc.co