Strengths and weaknesses of social media as a purveyor of news

Part 1: 150 words summary of the reading Pages 1-21 and 44-59 : https://assets.pewresearch.org/wp-content/uploads/sites/13/2016/06/30143308/state-of-the-news-media-report-2016-final.pdf

Part 2: 150 words answering the following question
Question: What are the strengths and weaknesses of social media as a purveyor of news? Be prepared to name at least two strengths and two weaknesses.