#SocialSkim: Twitter Kills Vine, Instagram Tests Live Video, Facebook Bulks Up for Businesses

Making the rounds on social media this week: Twitter and Pinterest were targeted in a massive cyberattack; Instagram made headlines as the latest social network to make a foray into live-streaming; Microsoft plans to compete with Slack; Facebook introduced new features for business pages; Twitter plans a massive round of layoffs; Snapchat viewership declines; five ways B2B marketers can effect.Read the full article

What Caused Massive Cyberattack?

The cyberattack that knocked out access to more than 1,200 websites including Netflix on Friday was launched with tactics used in past years by gamers looking to slow their opponents. WSJ's Lee Hawkins explains. Subscribe to the WSJ channel here: http://bit.ly/14Q81Xy More from the Wall Street Journal: Visit WSJ.com: http://www.wsj.com Follow WSJ on Facebook: http://www.facebook.com/wsjvideo Follow WSJ on Google+: https://plus.google.com/+wsj/posts Follow WSJ on Twitter: https://twitter.com/WSJvideo Follow WSJ on Instagram: http://instagram.com/wsj Follow WSJ on Pinterest: http://www.pinterest.com/wsj/

All of Facebook Live's new video ads

Facebook today launched an ad campaign promoting Facebook Live, its video broadcasting features.