Which two companies dominate the online ads market?

• A. Twitter and Facebook
• B. Amazon and Microsoft
• C. Google and Baidu
• D. Facebook and Google

Answer: (D)

Online advertising is dominated by players that offer huge reach, sophisticated targeting, and a full ad technology stack across search, social, and display. Google leads with search ads, YouTube, and its expansive display networks, delivering highly scalable reach and strong intent targeting. Facebook dominates social and mobile advertising through Facebook, Instagram, and Messenger, leveraging rich user data and precise audience targeting to deliver personalized ads at scale. Together, they capture a large share of global digital ad revenue, more than any other players, which is why they are recognized as the dominant pair in the online ads market. Other options have strong or regional presence (for example, Baidu in China or Amazon growing in ads), but they do not match the global dominance of Google and Facebook.