This page used to be called "Google Ads Invalid Traffic Benchmarks by Campaign Type", and it promised ranges it never showed. We changed it because those numbers do not exist in a form we can source honestly. Google does not publish invalid click rates by campaign type. We looked for independent, methodology-backed research that does and found none. The per-campaign figures that circulate come from click-fraud vendors' own customer data, which we do not cite.
What we can source is the channel-level picture across the wider ad market, and Google's own documentation on what each campaign type reports and lets you control. This guide combines those two into a relative-risk ranking and a checklist per campaign type.
What the independent data does show
Independent data measures invalid traffic by channel, not by Google Ads campaign type, and it points one way: mobile app inventory is the riskiest. Pixalate measured invalid traffic at 20% of web, 41% of mobile app and 26% of CTV impressions in open programmatic buying in Q2 2026.
| Channel | Invalid traffic rate | Source (publisher) | Year | Link |
|---|---|---|---|---|
| Web (desktop and mobile web), open programmatic | 20% | Pixalate | Q2 2026 | Pixalate benchmarks |
| Mobile app, open programmatic | 41% | Pixalate | Q2 2026 | Pixalate benchmarks |
| CTV, open programmatic | 26% | Pixalate | Q2 2026 | Pixalate benchmarks |
| US TAG Certified Channels (multiple parties in the transaction TAG certified) | Below 1% for a fourth straight year | TAG | 2024 | TAG press release |
These are not Google Ads measurements. Pixalate's data comes mainly from open auction programmatic traffic. The Google Display Network and YouTube are different inventory with Google's own filtering. Use the table for one conclusion only: the more a campaign type relies on third-party sites and apps, the more invalid traffic it is exposed to. For the full source list, see our click fraud statistics hub.
Relative risk by campaign type
Risk rises with three things: how much third-party inventory a campaign reaches, how little placement control you have, and how much automation decides where spend goes. The ranking below is our assessment based on those factors and on Google's documentation. It is not a measured rate.
| Campaign type | Inventory | Placement control | Relative risk | What Google reports |
|---|---|---|---|---|
| Search | Google search results | Keywords, negatives, network opt-out | Lowest | Invalid clicks column, search terms report |
| Shopping | Google Shopping and search results, optional Search partners | Products, negatives, network setting | Low | Invalid clicks, search terms, Search partner site report |
| Search partners | Third-party search sites | Network opt-out, account-level site exclusions | Medium | Site-level report (impressions only) since August 2025 |
| YouTube | YouTube videos and Shorts | Placement and content exclusions | Medium | Placement report, account-level exclusions |
| Demand Gen | YouTube, Discover, Gmail, Maps, optional Display Network | Channel controls per ad group | Medium, higher with Display on | Results by channel at campaign, ad group and ad level |
| Performance Max | All Google channels, including Display and Search partners | Account-level placement exclusions, campaign-level negative keywords, brand exclusions (Google Ads Help) | Medium to high | Channel performance report by channel |
| Display | Third-party websites and mobile apps | Placement targeting and exclusions | Highest | Placement report, Invalid clicks column |
Two rows deserve the most scrutiny for different reasons. Display has the most exposure. Performance Max has the least direct control.
Search: the lowest-risk baseline
Search has the lowest relative risk because every click follows a query the user typed, and you control the keywords and negatives that match it. That makes Search your cleanest comparison row.
Search is not immune. Competitor clicking, scripted repeat clicks and click farms target high-CPC keywords because each click costs the advertiser more. When Search goes wrong, the signs are concentrated: repeat clicks from the same sources, spikes outside your service area, or expensive keywords with short sessions.
What to check:
- Invalid clicks by campaign, next to conversion rate and qualified leads
- Search terms with spend and no qualified outcome
- Repeat-click concentration and hour-of-day spikes
- Geography against where your customers actually are
ClickFortify scores Search clicks in real time and adds fraudulent IPs to your Google Ads IP exclusions automatically. See Google Search click fraud protection.
Search partners: same query, less visible inventory
Search partners carry more risk than Google Search because ads serve on third-party search sites you cannot see in full. Since August 2025 Google has offered site-level placement reporting for the Search partner network on Search, Shopping and App campaigns (Search Engine Journal). The report shows impressions by site, not cost or conversions.
Since March 2024, account-level placement exclusions also apply to the Search partner network (Google Ads Help). Subdomain and subpage exclusions do not work there, so exclusions apply to whole sites.
What to check:
- Search partner results separated from Google Search (segment by Network with search partners)
- The partner site report for unfamiliar domains with heavy impression share
- Lead quality from partner traffic before you keep it on
For a full review process, read Google Ads Search Partners: Lead Quality and Exclusion.
Shopping: strong intent, exposure through partners
Shopping carries low relative risk because product ads match commercial queries, and you control the feed, negatives and network setting. Its exposure comes mainly from Search partners and from high-value product categories that attract competitor and scripted clicks.
What to check:
- Invalid clicks by Shopping campaign
- Search terms on high-value products
- Search partner performance, using the same site report as Search
- Device and location shifts that do not match your buyers
See Google Shopping click fraud protection and eCommerce Click Fraud Protection: Shopping and Search.
YouTube: video inventory with placement controls
YouTube sits in the middle. Ads serve on Google's own video platform, but across a very large range of channels and content, including views on TV screens. Account-level placement exclusions apply to YouTube (Google Ads Help), so you can remove channels that send low-quality traffic.
The Pixalate CTV figure above measures open programmatic CTV, not YouTube. Do not apply it to YouTube directly.
What to check:
- Placements with clicks but no engaged sessions
- Device type, especially TV screens, against your conversion path
- View and click patterns that look too cheap to be real interest
ClickFortify's native Google Ads protection covers YouTube campaigns alongside Search, Display, Shopping and Performance Max.
Demand Gen: risk depends on the channels you allow
Demand Gen risk depends on its channel mix. Google's channel controls let you choose YouTube, Discover, Gmail, Maps and the Google Display Network for each ad group. Google reports results by channel at the campaign, ad group and ad level (Google Ads Help). Keeping it to Google-owned surfaces narrows exposure. Adding the Display Network brings in third-party inventory.
Demand Gen traffic also starts from discovery, not a search. Clicks are more often curiosity than intent, so weak traffic shows up as poor lead quality more often than as invalid clicks.
What to check:
- Results by channel, especially Display Network against YouTube and Discover
- Soft conversions that never become qualified leads
- Maps leads, if Maps is enabled
See Google Demand Gen traffic protection and Google Demand Gen Maps Ads: Traffic Quality and Lead Quality.
Performance Max: the hardest row to audit
Performance Max carries medium to high risk because it can serve across every Google channel, including Display and Search partners, while automation decides the mix. Placement exclusions for Performance Max can only be managed at the account level (Google Ads Help).
Visibility has improved. Google's channel performance report breaks Performance Max results down by Google Search, Display Network, YouTube, Discover, Maps, Gmail and Search partners, with impressions, clicks, cost and conversions (Google Ads Help). It reports by channel, not by individual placement.
What to check:
- The share of spend going to Display and Search partners in the channel report
- Lead quality by channel, not just conversion volume
- Account-level exclusions for placements that send junk
- Brand traffic absorbing budget that Search would have won anyway
Go deeper with How to Protect Performance Max From Invalid Traffic, Performance Max Channel Reporting and Traffic Quality and Performance Max Brand Exclusions and Lead Quality. For protection, see Performance Max click fraud protection.
Display: the highest-risk inventory
Display carries the highest relative risk because it serves on third-party websites and mobile apps. That is where accidental taps, placements built for clicks and automated traffic are most common. The independent data points the same way: mobile app inventory had the highest invalid traffic rate of any channel Pixalate measured in Q2 2026.
Display also gives you the most control to fix it, through placement reports, exclusions and targeting.
What to check:
- Placement report for apps and sites with high CTR and no engaged sessions
- Mobile app placements, excluded by category if they never convert
- Session duration and scroll depth from Display clicks
- Cheap conversions that never mature into pipeline
See Google Display click fraud protection.
How to build your own per-campaign baseline
Google gives you the raw data for a per-campaign baseline. Add the Invalid clicks column to your campaigns table, and use the Invalid Activity Credit Report in Report Editor to see credited amounts. Google says it "catches most invalid traffic shortly after the ad interaction" and that "you aren't charged for invalid traffic detected before billing" (Google Ads Help). Credits for invalid traffic found later do not change campaign metrics retroactively.
Track one row per campaign type, every week or two:
| Field | Why it matters |
|---|---|
| Spend and clicks | Sets the scale of exposure |
| Invalid clicks and invalid click rate | What Google already filtered |
| Conversion rate and qualified lead rate | Shows waste Google did not classify as invalid |
| Qualified CPA | The cost of real outcomes, not raw conversions |
| Channel or placement mix | Shows where Display, apps or partners enter |
| Sales feedback | Catches fake leads that look like conversions |
Your goal is not a universal number. It is spotting which row degrades faster than the others. Blended account averages hide the campaign type doing the damage, so keep the rows separate.
Why credits are not the whole cost
Credits recover some billed waste, but they do not repair what invalid traffic already did to your data. Smart Bidding learns from conversions. If fake form fills or accidental clicks are counted as conversions, bidding shifts budget toward the sources that produced them. A credit next month does not undo that training.
This is why lead quality and qualified CPA belong next to invalid clicks in every per-campaign review. For the wider picture, read How Invalid Traffic Damages Lead Quality in PPC, the invalid traffic glossary entry and the Google Ads traffic quality review.
FAQ
Is there a published invalid traffic rate for each Google Ads campaign type?
No. Google does not publish invalid click rates by campaign type, and we found no independent, methodology-backed study that does. The per-campaign figures that circulate come from click-fraud vendors' own customer data. The reliable benchmark is the Invalid clicks column in your own account, compared campaign by campaign over time.
Which Google Ads campaign type has the highest invalid traffic risk?
Display carries the highest relative risk because it serves on third-party websites and mobile apps, where accidental and automated clicks are most common. Independent data supports the inventory point: Pixalate measured invalid traffic at 41% of open programmatic mobile app impressions in Q2 2026. That figure is not a Google Display measurement.
Is Performance Max riskier than Search?
Usually, yes. Performance Max can serve on Search, Display, YouTube, Discover, Gmail, Maps and Search partners, and placement exclusions can only be set at the account level. Google's channel performance report now shows results by channel, which makes the risk easier to check than it used to be.
How do I check invalid clicks by campaign type in Google Ads?
Add the Invalid clicks column to your campaigns table, as Google's help documentation describes, then compare invalid clicks per campaign with rejected leads and qualified CPA. For credited amounts, use the Invalid Activity Credit Report in Report Editor. The full walkthrough is in how to check invalid clicks in Google Ads.
Can Google credits fully recover invalid traffic losses?
No. Google says it catches most invalid traffic shortly after the ad interaction and does not charge for invalid traffic detected before billing. It credits some invalid traffic found later, but credits do not change campaign metrics retroactively and do not repair conversion data that already trained Smart Bidding.
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