NEW YORK — Verizon has long been known as a home phone and wireless service provider. But it’s evolving in order to make more money by tracking what we watch and read on our phones.

About two-thirds of U.S. adults now carry smartphones, according to the Pew Research Center, suggesting to some analysts that the market is peaking. But we’re spending more time on our pocket screens – about 2½ hours per day this year, on average, compared with less than an hour in 2011, according to market research firm eMarketer. Magna Global, a unit of advertising firm IPG, predicts that digital media ad sales will grow 62 percent this year on mobile.

So Verizon is preparing its next act by beefing up its advertising and media business. It spent $4.4 billion earlier this year to snap up AOL, which runs a digital-ad business as well as big Internet sites such as TechCrunch and the Huffington Post. Verizon also has started tracking its mobile users’ Internet surfing and other online behavior via controversial identifying code called “supercookies.”

Industry analyst Craig Moffett of MoffettNathanson said in a research note Tuesday that Verizon’s “next big growth engine” is customer data. “Verizon is turning its attention to its vast trove of information about the comings and goings of its 100 million wireless users,” he wrote. “Their goal is to reinvent the advertising business.”

Verizon’s traditional business is still doing just fine. The New York company said Tuesday that third-quarter revenue rose 5 percent to $33.2 billion, while net income climbed 9.9 percent to $4.17 billion.

That makes mobile ads and video “an investment in the future,” as eMarketer analyst Martín Utreras puts it, one that for now remains a small part of Verizon. The company is the country’s biggest wireless carrier and sells phone, Internet and TV service to millions of homes and businesses. It doesn’t break out advertising revenues.

“Verizon kind of gave us a clue with where they’re going with the launch of Go90,” Utreras said. Go90, launched in October, is a free mobile video service that offers full episodes of TV shows such as “The Daily Show” and MTV’s “Catfish,” sports, news and online video.

Nomura analyst Jeffrey Kvaal says the company expects to make money from mobile video by selling customers bigger data packages to handle data-hungry video. Verizon will likely also sell “pay-per-view” opportunities to big events such as concerts.

And, of course, there’s always advertising. “Instead of doing broad-brush marketing, we can go in and specifically target the individual with the ad,” Verizon CEO Lowell McAdam told an investor conference in September.

But Verizon’s plans on that front have been controversial. It now deploys its “supercookie” tracking code, which individuals can’t readily block on their own, to easily follow the way people use apps and surf the Web on Verizon phones. That information helps Verizon sell potentially lucrative targeted ads.

The company, however, has pulled back from what critics considered some of its more invasive early practices, said Nate Cardozo, a staff attorney at the Electronic Frontier Foundation. Previously, other companies could also track you using Verizon’s supercookies; now that’s more difficult. And Verizon now lets customers opt out if they call (866) 211-0874 or go to vzw.com/myprivacy.

Once Verizon merges the AOL ad network with its own ad programs next month, it plans to limit its tracking to traffic on Verizon’s universe of sites, as well as ads on other sites that use AOL’s wide-ranging ad network.

That’s still a lot of sites where Verizon will track its customers – potentially tens of thousands of them, said Cardozo. Verizon spokesman Ed McFadden said the company isn’t discussing those numbers.