The first in a series of quarterly social media reports, this report examines major developments in the global social media market based on trends, business activity and new data released in Q1 2019.

Despite a faltering economy and subdued growth across traditional media, total media ad spend in China will maintain strong growth on the back of increases in digital and mobile, where the top digital publishers will maintain their dominance.

In the latest episode of "Behind the Numbers," eMarketer principal analyst Debra Aho Williamson and research analyst Man-Chung Cheung discuss the new video-sharing sensation TikTok.

Influencer marketing is growing around the world, and a significant amount of activity is migrating to Instagram Stories. However, fraud is also growing, and that threatens the authenticity of influencer marketing.

No social app since Snapchat has succeeded in capturing significant usage in the US. But the Chinese-owned, short-video app TikTok is enjoying sudden growth in popularity. Can it buck the trend and challenge the existing social networks?