Marketing has gone through many transformations especially in the last decade. Here is a collection of 25 remarkable ideas that have changed the industry forever. Adapted from HubSpot's "100 Ideas That Changed Marketing" ebook Part 2: http://www.slideshare.net/iSmartcom/25-ideas-that-changed-marketing-part-2-51994733 Part 3: http://www.slideshare.net/iSmartcom/25-ideas-that-changed-marketing-part-3-51994730 Part 4: http://www.slideshare.net/iSmartcom/25-ideas-that-changed-marketing-part-4