Crowdfunding is an online method of fundraising from a large audience. Digital Word of Mouth (DWOM) via social media has become a popular promotion platform for crowdfunding campaigns due to its negligible nominal cost. While one may expect that promoting these campaigns on social media may steadily increase donations, the exact dynamics of such promotions have not been studied for donation-based crowdfunding. We collect panel data on several unique donation campaigns from a major donation-based crowdfunding website (gofundme.com) and analyze them employing a variety of econometric techniques. We specifically provide empirical evidence that promoting crowdfunded charitable campaigns using social media follows three phases throughout a campaign's lifecycle. Our results indicate that the general pattern of behavior is the same for charitable campaigns as it is for reward-based campaigns. This suggests that the psychological motives outlined in the literature are important for both types of campaigns. Because the economic motives are not present, this finding would not be clearly anticipated. We show that the contributing role of social media in a campaign's success varies over time and that it is most helpful in the first ten days of initiating a campaign. We also provide preliminary evidence that promoting charitable campaigns on social media can lead to slacktivism, an unexpected consequence of using social media as a promotion tool resulting in less donations and more social media flurry. We also find that if a campaign does not reach at least 70 percent of its goal after twenty days since launch, it is not likely to be successful. Fundraisers and charitable marketers can use our findings in gauging the effectiveness of raising awareness about their campaigns in the online world. They could also streamline the timing of social media promotions to enhance their impact on collecting donations for charitable causes.