According to eMarketer data from January through June, Facebook’s share of US online display ad revenues will grow to 17.7% in 2011, up from a 12.2% share last year. Facebook is expected to see $978 million in additional display revenues in 2011—more than display revenues will grow this year at Yahoo!, AOL, Microsoft and Google combined.

US display advertising revenues at Google will top $1 billion for the first time in 2011, as the company’s share of overall US display revenues grows to 9.3%, eMarketer estimates. That’s up from an 8.6% share in 2010, when Google’s US display revenues grew an estimated 140.5% to $855 million.

See more of eMarketer’s coverage on US display advertising revenues at top ad-selling companies.

Total revenues at Facebook, which include those from advertising as well as Facebook Credits and other sources, will reach $4.27 billion this year, eMarketer estimates. That’s more than twice as high as the $2 billion Facebook is estimated to have earned in 2010. Ad revenues will make up 89% of the total this year, down from 95% in 2009.

See more of eMarketer’s coverage on Facebook revenues.

US marketers will spend $3.08 billion to advertise on social networking sites this year, according to eMarketer data published in January. Spending will be up 55% over the $1.99 billion advertisers devoted to social networks in 2010 and will rise by a further 27.7% next year to reach nearly $4 billion.

This year’s dramatic growth in spending will bring social media ad dollars to 10.8% of the total spent online in the US.

A complete report, “Worldwide Social Network Ad Spending: 2011 Outlook,” is available to eMarketer Total Access subscribers. Learn more here.

To listen and watch playback of the webinar, Facebook Marketing—Strategies for Turning “Likes” into Loyalty, click here. You can view the PowerPoint deck below.

The webinar will address these key questions:

• How are marketers using their Facebook pages?
• How do consumers interact with brands on Facebook?
• What can marketers do to encourage ongoing involvement once a consumer has “liked” a brand or page?
• How do brands such as Adobe Photoshop, Chef Boyardee, Clarisonic and Discovery use Facebook?

About Debra Aho Williamson

Debra is eMarketer’s lead analyst focusing on social media marketing and the demographics of social media users. She produces eMarketer’s forecasts for social network advertising spending in the US and worldwide and has written more than two dozen reports delivering key insights covering how marketers, media and consumers are engaging with social media. A founding executive editor of pioneering internet business publication The Industry Standard, Debra is quoted for her analysis in the business press and invited to speak at major digital marketing internet events.

Sponsored by Vitrue.

Here are a few of the top stories in which eMarketer data and analysis were featured this week:

7/7: WSJ.com – Apple Adds Flexibility to IAds
Apple is offering Madison Avenue more flexibility in getting in on its iAd mobile advertising service. The Cupertino, Calif., company has begun pitching ad buying firms on making large upfront iAd spending commitments that they can parcel out to their advertiser clients in smaller chunks. Read more.

7/7: Beet.TV – Online Video’s Troubling Ad Equation: Less Transparancy Means Lower Cost
In making online video buying decisions, marketers face the choice of spending more for video when they know where their ads are placed versus paying less when their ads are matched with videos through exchanges and video ad networks, says Vipin Mayar, Global Director of Performance Analytics for McCann Worldwide in this interview with Beet.TV. Read more.

7/7: NYPost.com – Games, tweet, games
Twitter CEO Dick Costolo isn’t playing around any more. The tweet chief, who recently landed in Sun Valley, is looking beyond advertising to boost Twitter’s business prospects. Read more.

7/7: Bloomberg.com – Apple’s IAd Mobile-Ad Service Said to Cut Prices as Clients Turn to Rivals
Apple Inc. (AAPL)’s iAd mobile-advertising business has cut rates by as much as 70 percent as some marquee clients are using rival services, two people with knowledge of the matter said, signaling the company is struggling to parlay its technology leadership into success in the ad industry. Read more.

7/6: Mashable.com – Why Daily Deal Sites Are Here to Stay [OPINION]
If something is too good to be true, then it probably is. But once in a generation, an idea (or in this case, a business model) comes along that is so disruptive that the old the adage is proven wrong. Read more.

7/6: Guardian – Facebook gets even more face-to-face thanks to Skype partnership
Facebook users will be able to make free video calls to their friends through the site after the social networking giant announced a partnership with the web telephony service Skype. Read more.

7/6: ClickZ.com – Buying and Placing Online Display Ads
According to the Interactive Advertising Bureau (IAB), Q1 2011 set an all-time record in Internet advertising with $7.3 billion in revenues, a 23 percent year-over-year increase. Read more.

7/6: Bloomberg.com – Facebook Ad Rates Hold as Inventory Rises, Easing Price Concerns
Facebook Inc., the biggest social network, said advertising rates have held up even after it added new ways for marketers to promote products, allaying concern that prices would decline as inventory surged. Read more.

7/6: Wall Street Journal – Twitter Seeks $7 Billion Valuation
Even as Internet companies such as Zynga Inc. and Groupon Inc. file to go public, Twitter Inc. is taking a different route: It is continuing to tap private investors. Read more.

7/5: GigaOm.com – Is Twitter helping to inflate the tech bubble?
A little over six months after the company raised a gigantic round of financing that valued it at close to $4 billion, Twitter is in negotiations to close other massive round, according to a report in the Wall Street Journal. Read more.

7/5: Forbes.com – Online Ad Spending Jumps, Led By Video and Facebook
This year will be the best in recent memory for online advertising, which a new report from eMarketer predicts will grow more than 20%, to $31.3 billion. Search ads mostly from Google, of course, will continue to lead the way, with $14.4 billion of the total take in 2011. Read more.

For more of eMarketer’s recent news coverage, click here.