Greenpeace launched a successful campaign against Nestlé's Kit Kat over its use of unsustainable palm oil, which involved a viral parody video portraying Kit Kat as harmful to orangutans. The campaign gained significant traction on social media, leading to overwhelming public pressure on Nestlé, which eventually agreed to stop sourcing unsustainable palm oil. Nestlé's poor handling of the situation, including deleting negative comments and failing to engage proactively, contributed to the campaign's success and a substantial drop in Kit Kat's brand sentiment.