Live-streaming has become a big focus in 2017. From a controversial standpoint, features such as Facebook (FB) Live have drawn headlines for some disturbing incidences. But when used correctly, Facebook Live, Twitter's (TWTR) Periscope and other platforms have a lot of entertaining potential.

That's why the world's top video site, Alphabet's (GOOGL) YouTube, being involved makes a ton of sense. In fact, ranked right behind Google as the world's top website is YouTube at No. 2. 

In any regard, YouTube has added a live-streaming option to its mobile app, which has helped push it to the top of Apple's (AAPL) App Store. It's the first time that YouTube has held the App Store's No. 1 position since December 2015. 

Live streaming is growing in popularity. However, YouTube only allowed users with more than 10,000 subscribers to participate. As part of making it available on the app, YouTube has toned down those restrictions, allowing anyone with more than 1,000 followers to live stream. 

Users can now stream directly from their smartphone, rather than having to do so on a desktop. The use of an app is meaningful, as users can stream not just on the go, but can broadcast more interesting content to its followers. 

It can also be visualized where users live-stream breaking news or events right from their smartphone onto the YouTube platform.

Shares of Facebook closed $143.80 Thursday, up 1.1%. 

How does Google make its billions? Among other ventures, it mostly comes down to its ad business. More specifically, Google operates the most popular website and search engine in the world. From there, it generates advertisement revenues from companies looking to get more exposure. So news of it creating an ad blocker on its own Google Chrome web browser seems ironic, right?

It might not be as crazy as it sounds, though. This won't be a case of Google shooting itself in the foot either. In fact, it will actually be shooting others in the foot. 

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