Marissa Mayer: Yahoo has 'some of the best data in the industry'

While boasting "great success" with native advertising since 2013, Yahoo's CEO admitted "we had to reinvent ourselves" to be a "mobile application company" kept afloat by display ads.

SAN FRANCISCO---Yahoo and Tumblr have more than a billion users combined, prompting Yahoo's chief executive officer Marissa Mayer to advertise the value of the technology company's data to, well, advertisers.

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Speaking at the Goldman Sachs Technology and Internet Conference on Wednesday, Mayer boasted Yahoo has "some of the best data in the industry" generated on its own platform as well as across its network, meaning Yahoo could better help advertisers target particular users.

For example, Mayer suggested the Sunnyvale, Calif.-headquartered company is "just beginning to tap the opportunity" from data generated on the Yahoo Mail and Fantasy Football properties.

"We've always been really strong in being a guide to the Internet," Mayer remarked. Now, she continued, it's about reapplying that guide to newer channels, primarily social, mobile and video - not to mention Yahoo's stalwart cash cow: digital advertising.

While boasting "great success" with native advertising since 2013, Mayer admitted "we had to reinvent ourselves" to be a "mobile application company" kept afloat by display ads. ads that are better, more targeted, and engaging with users.

"These are ads that present themselves in an infinite stream of news or as a picture in a slideshow," Mayer explained, adding "video by its very nature has always been native," which is why Yahoo breaks those numbers out separately.

Nevertheless, the rebuilding process is still ongoing. Mayer glossed initial bumps with last year's launch of Yahoo Ad Manager Plus, which she insisted have since been resolved. Yahoo is also smoothing out integrations stemming from the acquisitions of mobile app analytics firm Flurry and video ad platform BrightRoll.

Mayer briefly touched upon Yahoo's stake in Chinese e-commerce giant Alibaba. Yahoo announced in January that the investment would be spun off into standalone tax-free structure, still subject to a one-year lockup. Mayer said the spinoff offering is expected to go through by the fourth quarter of 2015.

Mayer is just one of the many high-profile CEOs from Silicon Valley taking the stage at the annual Goldman Sachs summit this week.

On Tuesday, Apple CEO Tim Cook announced news about the iPhone maker's new $850 million solar farm coming to Monterey, Calif. while dropping a few hints about the Apple Watch scheduled to ship this April.

Cook quipped one of the biggest surprises to Apple Watch will be "the breadth of what it can do."