In a 2015 study supported by IBM, the US Chamber of Commerce Foundation, found that raising a company's reputation 1 point required 500 general social media snippets or only 50 corporate citizenship snippets (in an 18 day period). (1)
(1) Bowdish, Lawrence and Diane Melley. "The Sentiment of Corporate Citizenship."Connect the Dots: How Businesses Solve Global Challenges Locally". United States Chamber of Commerce Foundation, Washington, D.C. October 5-7, 2015. Conference Presentation.