The board of Yahoo, the faded Web pioneer, agreed Sunday to buy the popular blogging service Tumblr for about $1.1 billion in cash, people with direct knowledge of the matter said, a signal of how the company plans to reposition itself as the technology industry makes a headlong rush into social media.
The deal, which is expected to be announced as soon as today, would be the biggest acquisition of a social networking company since Facebook paid $1 billion last year for Instagram, the photo-sharing site.
For Yahoo and its chief executive, Marissa Mayer, buying Tumblr would be a bold move as Ms. Mayer tries to breathe new life into the company. The deal, the seventh since she defected from Google last summer to take over the company, would be her biggest yet.
It is meant to give her company more appeal to young people, and to make up for years of missing out on the revolutions in social networking and mobile devices. Tumblr has more than 108 million blogs, with many highly active users.
Yet even with all those users, a basic question about Tumblr and other social media sites remains open: Can they make money?
Founded six years ago, Tumblr has attracted a loyal following and raised millions from big-name investors. Still, it has not proved that it can be profitable, nor that it can succeed on mobile devices, which are becoming the gateway to the Internet. Even Facebook faces continued pressure from investors to show it can increase its profits and adapt to the mobile world.
"The challenge has always been: How do you monetize eyeballs?" said Charlene Li, the founder of the Altimeter Group, a consulting firm. "Services like Instagram and Facebook always focus on the user experience first. Once that loyalty is there, they figure out how to carefully, ideally, make money on it."
A Yahoo spokeswoman declined to comment. A representative for Tumblr did not respond to requests for comment.
If the deal is approved, Ms. Mayer will face the challenge of successfully managing the takeover, given Yahoo's notorious reputation for paying big money for startups and then letting the prizes wither. Previous acquisitions by Yahoo, like the purchase of Flickr for $35 million and a $3.6 billion deal for GeoCities, an early pioneer in social networking, have been either shuttered or neglected within the company.
Because of this, Ms. Mayer will face pressure to keep Tumblr's staff, led by its founder, 26-year-old David Karp, who dropped out of high school at 15. It is unclear whether all of Tumblr's 175 employees, based in New York City, will move over to Yahoo.
At the same time, analysts and investors are likely to question whether buying a site that has struggled to generate revenue makes sense.
"This is not an inexpensive acquisition, but they're willing to pay to get back some of what they've lost," said Colin Gillis, an analyst at BGC partners. "They want to be hip."
Tumblr brings something that Ms. Mayer has sought for some time: a full-fledged social network with a loyal following. The startup reaches 44 million people in the U.S. and 134 million around the world, according to Quantcast.
But in some ways, Yahoo is not pursuing users -- it already claims 700 million, one of the biggest on the Web -- but products and services that would again make it a central destination.
Once the biggest seller of display ads in the U.S., Yahoo has ceded market share to the likes of Google and Facebook.
The company also missed the shift from the Web to smartphones and tablets. It waited a significantly long time to roll out apps for its most popular services, missing out on chances to harvest users to competitors like Google and Apple.nation - businessnews