We have downgraded our forecast for total and digital media ad spending in China, but are not making any other major adjustments to our worldwide estimates due to the impact of the COVID-19 outbreak yet.

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.

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.

Instagram will remain the world’s second-largest social network in 2019, with 788.4 million users. Growth will primarily come from emerging or developing economies, including Russia and India, but every country that we track will add new users in 2019.

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.

Snapchat will have 293.0 million users in 2019, up 14.3% on the previous year and outpacing the growth rates of Facebook, Instagram and Twitter. Growth has returned to core developed markets, while the pace of growth in developing markets is significant.