“Video is the future of content marketing,” according to The Guardian. While this statement may sound provocative and reductive, it also has a ring of truth.

Inspiring others to share your content is a daily battle for content marketers, and this is exactly why we love viral marketing. According to kissmetrics, “a successful viral campaign can have 500–1000 times more impact than a non-viral campaign.” We are always looking for new and innovative ways to increase social engagement, so here’s a look at some of our favorite viral marketing success stories.