By Jeff John Roberts

According to estimates, 30 percent of online ads are seen by no one at all. This happens when ads are stuffed on part of a Web page that no one sees or when an ad doesn’t finish loading until after a reader has scrolled past it.

In either case, the phantom ads amount to a frightful waste for ad buyers and a problem for publishers who still face skepticism about the efficacy of online ads.

A New Era of Online Ads

Now, new ad technology is promising to eliminate ghost ads while also giving publishers new tools to assign premium or bargain prices to ads on different parts of a webpage.

Both comScore and SAY Media say they’ve solved the phantom ad menace with kits that let advertisers use dashboards to confirm the ads they buy are seen and not just served.

“Advertisers will know what’s rendered and what’s not,” says Matt Sanchez of SAY Media, whose partner sites include popular tech destinations like TechDirt and ReadWriteWeb. He says the technology produces click through rates three to four times higher than the industry standard.

The upshot of the new ad metrics should be a drop in overall ad inventory and an increase in CPM (cost per thousand impressions) because advertisers can now have more confidence about about what they’re buying.

The new tools, which both companies have unveiled in the last few weeks, may also juice the market for ads based on views alone.

According to Forbes’ Chief Insight Officer, Bruce Rogers, many brands responded to the financial crisis by retrenching to ads based on “transactional activities” — in other words, they’ll pay for ads that are clicked but not having their ads simply appear on a site.

Rogers hopes that Forbes’ decision to use comScore’s new tool, called “Validated Campaign Essentials,” will lead more ad buyers to build brand awareness by paying for pure impressions.

‘Gold below the Fold’

New ad verification techniques are likely to change not only ad buyers’ calculations but those of publishers as well.

According to Andrew Lipsman of comScore, content companies may be undervaluing some of their “below the fold” inventory. In practice, this means they’re selling down-the-page ads at a clearance even when those ads may be getting some of the best exposure on their site.

“There’s gold below the fold,” says Lipsman, who claims the new technology will allow publishers to identify and properly price their best ad space.

Read more: Gold below the fold: new metrics promise end of unseen ads — paidContent.