Every week on eMarketer’s “Behind the Numbers” podcast, we take a few minutes to discuss some of the most intriguing headlines of the past seven days. This week, we're chatting about Bitcoin, tech taxes, and a novel you can read on FB Messenger.

Popular social networking app Weibo (Sina Weibo) will continue its double-digit growth this year in China, according to eMarketer’s first forecast on Weibo usage. This year, Weibo usage will grow more than 17% to 340.1 million people in China. By the end of 2018, 24.6% of China’s population will be a Weibo user.

In the first of a three-part series on digital video and TV, analyst Paul Verna breaks down the data on ad spending and subscription fees. When will digital video ad spend catch up with TV ad spend? How much subscription income is flowing into services like Netflix and Hulu?

This third annual StatPack compiles key metrics around digital video, television and the relationship between them.

Facing similar challenges in rekindling user growth, Snapchat and Twitter seem to be at a crossroads. In the new episode of “Behind the Numbers,” analyst Debra Aho Williamson digs into the companies’ latest results, and looks ahead to what she expects their Q4 to look like.

This year, 84.8 million people in the US—or roughly a quarter of the population—will use Snapchat, a 7.1% increase from 2017, according to eMarketer estimates.

This year, 55.2 million people in the US will use Twitter. That's 16.8% of the population and a 0.9% increase from 2017, according to eMarketer estimates.

Our updated US ad spending forecast shows digital ad spending outpacing expectations. Digital media will capture $111.14 billion in ad dollars in 2018 and surpass traditional media ad spending by 2019, according to our latest estimates.

For the first time, we have created estimates for social network video ad spending, including Facebook, Snapchat and Twitter. In 2018, the segment will total $7.85 billion in ad spending.

Today, more than four of every five US digital display ad dollars transact programmatically. This report looks at the trends driving programmatic ad spending to $68.87 billion by 2020, breaking it down by transaction type, format and device.

John Egan, head of demand, EMEA, at mobile app ad exchange MoPub, a Twitter company, discusses how marketers are continuing to work on cracking the code on in-app programmatic advertising.

This year will mark a milestone for digital video advertising in the US, according to eMarketer’s latest ad spending forecast. In 2018, video will grow nearly 30% to $27.82 billion. That means video ad spending will make up 25% of US digital ad spending.

Snapchat and Twitter are very different properties, but they have one thing in common: Both remain in the shadow of Facebook and Instagram.

In the latest episode of "Behind the Numbers," eMarketer's Bill Fisher and Showmik Podder discuss the current state of advertising spending in the UK.

Usage and ad revenues have taken hits in recent months, but both companies are moving forward with new ad products—and they offer unique features that are causing some marketers to give them a second look.

Nancy Inouye, national media manager at Toyota Motor North America, explains why Twitter and Snapchat advertising remain beneficial for the brand.

US social network video ad revenues will grow sharply over the next several years, reaching $11.69 billion by 2020, according to eMarketer's new estimates. And one company in particular will win the lion's share: Facebook.

Video monetization is strong across advertising and consumer-supported platforms, signaling overall health in the market. As new digital platforms emerge and existing ones solidify their positions, viewing continues to veer away from linear TV and toward digitally connected screens of all sizes and types.

Instagram is quickly gaining users in Latin America. eMarketer estimates that the number of users more than doubled between 2015 and 2018, from 54.9 million to 125.9 million.

In the latest episode of eMarketer's "Behind the Numbers" podcast, we dig into a variety of data about news consumption on social properties. How many people get their news on social? And do they trust it?