You’re a social media user. Maybe even an early adopter. Then you may have heard of Thunderclap. If not, check out this terrific video introducing this powerful crowd-speaking platform that helps people be heard by saying something together. The platform allows you to lend your voice to a cause – along with the voices of many others. (Depicted in the screen shot above is New York Presbyterian’s Thunderclap page where supporters can join in and help share NYP’s message celebrating the 10th anniversary of its Morgan Stanley Children’s Hospital.) Watch the video to learn how Thunderclap works.