Good morning, AdLand. Here's what you need to know today:

A new study from Social@Ogilvy quantifies a phenomenon brands and agencies were already displeased with: the steep decline in Facebook reach they were able to get without paying for promotion. Organic reach, the percentage of the people who have liked a page who are then able to see the page's average post in their newsfeeds, has been cut in half since October, the study found. In analyzing 106 big brand pages, Social@Ogilvy found that organic reach plummeted from 12.05% in October to 6.15% in February, a result of Facebook tweaking its newsfeed algorithm.

Some news out of TBWAChiatDay this morning. Team Backslash is bringing TBWAHelsinki's Martin Mohr to the New York office to lead digital creative across clients. Also, TBWA announced its Digital Arts Network is expanding with five new offices in Brazil, Israel, Russia, Spain, and Switzerland, bringing the DAN from 18 offices to 23.

Arnold NYC's Aaron Griffiths, chief creative officer for clients like St. Ives, has left the agency after two years.

Oreo will use Twitter trends to trigger 3D-printed Oreos at South By Southwest.

A new campaign for Corona Light by Goodby Silverstein & Partners is touting the beer as "the light beer you can actually taste."

IPG Mediabrands and TubeMogul have created an ad-tech apprenticeship that includes six-month rotations at each of the companies.

Lowe Campbell Ewald chief digital officer Ken Burbary is no longer with the agency, according to AgencySpy.

Digiday looks at some of the best brand mascot Twitter bios.

Previously on Business Insider Advertising:

How Bloomberg Pursuits Wound Up Shooting A Fashion Spread Inside The United Nations Former Victoria's Secret Angel Miranda Kerr Just Scored A New Lingerie Campaign 5 Subliminal Sex Messages Hidden In Ads For Wholesome Brands The First Teaser Trailer For 'Mad Men' Season 7 Is Very Mysterious Comcast Buys Video Ad Tech Firm FreeWheel To Integrate Ad Operations Across TV And The Web Cadillac Says Viewers Should Calm Down About Its Obnoxious Electric Car Ad Why So Many Brand Names Have Terrible Spelling And Punctuation Facebook's New Ad Stars An Alien, A Stormtrooper, And A Transformer

See Also:

Belgian Telecom BASE Made The Perfect TV Ads For People Who Want To Watch Video Online, Instead [THE BRIEF]New Snickers Ad Claims Godzilla Is Only A Murderous Monster When He Is Hungry [THE BRIEF]This Samsung Paralympics Ad Makes The Regular Olympics Look Easy [THE BRIEF]