Twitter’s plateauing user growth has been evident for the past few years. But its user base is stable and ticking upward. We expect it to maintain its substantial influence worldwide as a platform for political discourse and real-time events coverage.

Facebook will have 1.73 billion worldwide users in 2019 and will add a quarter of a billion more users by 2023. These gains are primarily happening in developing countries, while developed markets including South Korea, Japan and France are shedding users.

In 2019, the number of social network users worldwide will grow by 5.9% and approach 3 billion. By 2023, almost 80% of the online population will visit social networks at least monthly.

TikTok, the Chinese short-video app, is taking off in the US, India and elsewhere. It offers many unique marketing opportunities, such as the Hashtag Challenge, but marketers should take note of some risks.