1) The NYC Health Department launched a campaign to promote condom use among teens using targeted social media ads and crowdsourcing ideas for condom designs. This increased awareness and changed perceptions of condom use.
2) An online Jewish community called OurJewishCommunity.org used social media and online content to engage Jews who could not regularly attend in-person services due to busy schedules and geographic isolation. This helped strengthen Jewish identity.
3) Both cases showed that social media and crowdsourcing can effectively engage communities and change perceptions, though in-person engagement is also important.