NEW YORK, March 29, 2018 -- Flashtalking, the leading global independent platform for ad management, data activation and unified insights announces publication of the industry’s first independent, accurate analysis of cookie rejection rates. Following its long-term study of cookie rejection across its advertiser base, the company releases the new “Cookie Rejection Index” to educate the industry on the state (and impact) of cookie rejection.
Marketers have long relied on cookies as a basis for tracking and measurement. With a nod to the consequence of cookie rejection for marketers industry-wide, eMarketer recently previewed the Index, acknowledging the current reality: the challenges of tracking user engagement via cookies has reached the tipping point. The continued shift towards mobile – where cookies are largely blocked – and increasing restrictions on desktop browsers have cast a large shadow on the reliability of 3rd party cookies
“Everyone knows cookie rejection is a problem, but few understand how big the problem is,” said Steve Latham, global head of analytics at Flashtalking. “Marketers are seeking to become data-driven, but their data is full of holes. They are making big bets on programmatic, personalization, attribution and marketing mix – all of which rely on cookie-based data. As research shows, reliance on cookies is now a material risk for most advertisers. With this report we’re seeking to shine a light on data quality issues that impact the entire industry.”
To quantify the impact and limitations of cookie-based measurement, Flashtalking set out to conduct the industry’s first independent assessment of cookie accuracy. Based on a cross-section of 20 advertisers, the company found that for a typical advertiser:
- 64% of cookies will be rejected
- Reported Reach will be overstated by 89%
- Reported Frequency will be understated by 47%
- Reported Conversions for display and video will be understated by up to 41%
About Flashtalking
Flashtalking is a data-driven ad management and analytics technology company. We help sophisticated marketers use data to personalize advertising, analyze its effectiveness and optimize performance across channels and formats. Our platform leads the market with innovative products and services to ensure creative relevance and unbiased, actionable insights, powered by proprietary cookieless tracking, data unification and algorithmic attribution. Born in the UK, established worldwide, Flashtalking spans the globe with offices in New York, San Francisco, Los Angeles, Chicago, London, Leeds, Cologne, Hamburg, Amsterdam, and Sydney. For more information visit www.flashtalking.com.
Contact:
Kendall Allen
WIT Strategy
For Flashtalking
[email protected]


Nvidia CEO Jensen Huang Says AI Investment Boom Is Just Beginning as NVDA Shares Surge
CK Hutchison Launches Arbitration After Panama Court Revokes Canal Port Licences
Kroger Set to Name Former Walmart Executive Greg Foran as Next CEO
Trump Backs Nexstar–Tegna Merger Amid Shifting U.S. Media Landscape
Once Upon a Farm Raises Nearly $198 Million in IPO, Valued at Over $724 Million
Prudential Financial Reports Higher Q4 Profit on Strong Underwriting and Investment Gains
Indian Refiners Scale Back Russian Oil Imports as U.S.-India Trade Deal Advances
Rio Tinto Shares Hit Record High After Ending Glencore Merger Talks
Weight-Loss Drug Ads Take Over the Super Bowl as Pharma Embraces Direct-to-Consumer Marketing
TrumpRx Website Launches to Offer Discounted Prescription Drugs for Cash-Paying Americans
Amazon Stock Rebounds After Earnings as $200B Capex Plan Sparks AI Spending Debate
Baidu Approves $5 Billion Share Buyback and Plans First-Ever Dividend in 2026
Nvidia, ByteDance, and the U.S.-China AI Chip Standoff Over H200 Exports
Alphabet’s Massive AI Spending Surge Signals Confidence in Google’s Growth Engine
Washington Post Publisher Will Lewis Steps Down After Layoffs
Samsung Electronics Shares Jump on HBM4 Mass Production Report
SpaceX Prioritizes Moon Mission Before Mars as Starship Development Accelerates 



