Google is hiring thousands of new moderators after facing widespread criticism for allowing child abuse videos and other violent and offensive content to flourish on YouTube.

...The news from YouTube’s CEO, Susan Wojcicki, followed a steady stream of negative press surrounding the site’s role in spreading harassing videos, misinformation, hate speech and content that is harmful to children.

Wojcicki said that in addition to an increase in human moderators, YouTube is continuing to develop advanced machine-learning technology to automatically flag problematic content for removal. The company said its new efforts to protect children from dangerous and abusive content and block hate speech on the site were modeled after the company’s ongoing work to fight violent extremist content...

The statement also said YouTube was reforming its advertising policies, saying it would apply stricter criteria, conduct more manual curation and expand its team of ad reviewers.