Rebecca Lieb, a media and advertising analyst at Altimeter Group, said 1 billion is an abstract number.
"As impressive and as big as Facebook is, by breaking it down more regionally we are getting more of an idea," she said.
The company also released the number of active monthly and daily mobile users in the United States and the U.K.
Television commands the largest share of advertising money spent in the United States at 39 percent, according to eMarketer research, which estimated that $66.3 million in would go to TV this year. Digital advertising represents about 25 percent of estimated advertising spending this year, at $42 million.
Still, a shift is occurring. The average time spent daily with digital media is expected to surpass TV viewing for the first time this year, according to eMarketer.
Underscoring the change taking place in people's habits, WPP founder and CEO Martin Sorrell expects up to 45 percent of the agency's business to go toward digital within five years, he wrote in a post on LinkedIn.
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Facebook delivered its strongest ad revenue growth performance in almost two years in July as it benefited from 18 months of retooling its products, including a mobile version of its service. Total ad revenue in the second quarter was $1.6 billion, and its shares are up almost 50 percent over the past month.
The company is widely expected to launch a revamped video advertising service, but Everson declined to comment on that.
"The conversation now is how can you reach this amount of people and target them," she said about how advertisers want to limit "waste" in trying to reach the right consumer.
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Because Facebook's audience is so large, it has the ability to target consumers, Everson said.
"Eyeballs are important, but they are not the only thing in advertising," said Clark Fredricksen, a vice president at eMarketer. "The receptiveness of the TV audience is ultimately the reason why it's such a huge ad medium.
"Sitting and watching the screen is different than clicking and operating on an agenda," he said.