When we run ad campaigns through Facebook, we can either decide to serve these ads on Facebook itself, or expand their distribution to a wider network of mobile apps: the latter option is Facebook Audience Network.
On January 12, 2017 Facebook announced an important milestone for Facebook Audience Network:
[…] we’re excited to share that over one billion people see an ad through Audience Network every month.
In other words, every month, more than one billion unique people globally — that’s 1 in 7 persons on the planet — see at least one ad impression served through Facebook Audience Network.
And that seems to be one of the first steps on the path of realizing a much more ambitious vision:
At Facebook, we like to say that our journey to connect the world is only 1% finished. We’ll keep driving toward our goals of helping people connect with the businesses and brands they care about, on publishers that meet our quality standards.