For direct marketers, tools including Offers, Custom Audiences and FBX are fueling growth.

FORBES: By The Numbers: Everything You Want To Know About How Facebook Ads Fared In Q4

In September we released our custom audiences tool, which lets marketers reach their current customers with relevant ads on Facebook.

FORBES: Facebook Makes It Easier To Target Ads Based On Your Shopping History

Facebook, for example, recently introduced its Custom Audiences feature, which allows campaigns to be targeted to specific customers and prospects.

FORBES: Why The Brand Content Trend Is One Marketers Can't Bypass

Facebook also emphasized in its release on the earnings other revenue products such as Custom Audiences, Offers and mobile developer app install ads.

FORBES: Move up http://i.forbesimg.com t Move down

These include gifts, Facebook exchange and custom audiences, among others.

FORBES: The Comeback Kids: Apple And Facebook

Sheryl Sandberg, Facebook's Chief Operating Officer, on the call also discussed Custom Audiences, which is a way for advertisers to target customers they already have a relationship with on Facebook.

WSJ: Facebook Revenue Rises 40% as Mobile Ad Sales Strengthen

JackThreads , an online shopping site for men, used Custom Audiences to target specific segments of its customer database and target them with ads for products in categories the company knew were most relevant to them such as sneakers.

FORBES: By The Numbers: Everything You Want To Know About How Facebook Ads Fared In Q4