Research firms and vendors have varying methodologies and definitions for ad fraud, which creates divergent forecasts. Estimates of recent annual losses to digital ad fraud range from $6.5 billion to $19 billion. Some of the most definitive statistics come from anti-fraud vendor White Ops and advertising trade group the Association of National Advertisers (ANA).

eMarketer principal analyst Nicole Perrin discusses the declining ad fraud problem. How is ad fraud affecting the industry? And how is the industry fighting back?

Programmatic ad spending will reach $59.45 billion in 2019, accounting for 84.9% of the US digital display ad market. This report looks at the trends driving investment to $81.00 billion by 2021, breaking it down by transaction type, format and device.

This StatPack provides a visual overview of trends in display, video and mobile ads bought programmatically, both in the US and worldwide.

Over the past year, marketers and consumers have become more aware of location data’s capabilities. This report looks at its growing utility and surrounding privacy concerns.

With viewers, content and ad dollars continuing to flow to digital platforms, it is more important than ever to adopt best practices in video and TV advertising, and to coordinate them across the entire device spectrum.

In a poll conducted by ad measurement firm Integral Ad Science (IAS), 69.0% of agency executives say that fraud is the biggest hindrance to ad budget growth, compared with more than half (52.6%) of brand professionals who said the same.

In the latest episode of "Behind the Numbers," senior analyst Nicole Perrin digs into her recent research into ad fraud. How big a problem is ad fraud, and where are the greatest vulnerabilities?

For blockchain to have an impact on ad fraud, all parties to a programmatic transaction must agree to use it—and use the same system. Thus, adoption has been limited.

Will the duopoly dominate in 2019? Will consumer privacy concerns challenge marketers’ efforts? This report explores these digital display trends and more.

The multilayered approach that scammers use to siphon money highlights the cat-and-mouse problem of policing ad fraud.

Every week on eMarketer’s “Behind the Numbers” podcast, we take a few minutes to discuss some of the most intriguing headlines of the past seven days. This week, we're chatting about "misinformation bots," a digital ad fraud ring, and more.

Fraudsters are trying to make a buck off the ad dollars that flow to mobile. Some research suggests that more than one-quarter of app installs are fraudulent.

Every few months it seems another story emerges about ad dollars disappearing down a black hole of fraudulent activity. And the spotlight on fraud will shine ever brighter, with good reason. For the UK, we forecast that digital ad spending will reach £13.24 billion ($17.05 billion) in 2018, accounting for 63.8% of total media ad spend.

Digital ad fraud is being held in check, viewability rates are improving, and brand safety measures are largely effective in the UK. Measuring the success of a campaign, though, must move beyond what is easily measurable.

Today, more than four of every five US digital display ad dollars transact programmatically. This report looks at the trends driving programmatic ad spending to $68.87 billion by 2020, breaking it down by transaction type, format and device.

Research from Confiant shows that raising price floors isn’t a panacea for ad buyers hoping to avoid fraud.

The top challenge of addressing ad quality issues is tracking down bad actors in the supply chain.

Amit Joshi, director of product and data science at Forensiq, talks about the new tactics scammers use to take advantage of the mobile ad spend surge.

Mobile apps are eating the world, and marketers need to get on board. This report provides an overview of paid and organic app user acquisition strategies, as well as some problems related to attribution and ad fraud.