In recent years, business decisions and investment strategies have increasingly incorporated concerns of social issues. With increasing public attention on Corporate Social Responsibility (CSR), companies doing “harm” or “good” to society have eminently impacted the brand image, consumer perception, and employee retainment. To gain public awareness of companies’ improvement on CSR, companies share sustainable and ethical practices and business strategies on social media, such as Twitter. In this study, we aim to analyze the impact of social media as a moderator on the association between strengths and weaknesses of corporate social actions, and investigate whether the negative performance of CSR in the past leads to exemplary performance in one lag year.