See How Google Tracks You for 30 Days to Identify What Has "Converted" You Via Digital Marketing

Digital ad companies such as Google, Microsoft, Yahoo and others tout their ability to "convert" an individual to engage in some action--buying a product, clicking a video, filling out a form, and other proactive responses.  Digital marketing companies want to generate more revenues by taking credit for how they have influenced your online behaviors--over the course of a day, week, month or even more.  So-called "conversion tracking"--which is really online surveillance--is used by many companies online. 
Google has just unveiled "Multi-Channel Funnels" on its analytics service.  See the Google video for insight in how the process of profiling and tracking works--all without our opt-in consent [let alone our awareness].  
Here's how a Google exec explains the service to marketers and advertisers:  "When a customer buys on your site, most conversion tracking tools credit the most recent link or ad clicked. In reality though, customers research, compare and make purchase decisions via multiple touch points across multiple channels, so a lot of marketers are not seeing the full picture when it comes. So earlier this year, we introduced Multi-Channel Funnels, a set of reports that gives marketers more visibility into the full path to conversion over a 30 day period. This allows advertisers to compare interactions across various digital channels so they can understand how their channels work together to impact conversions. This is a great step towards where we’re going... providing insight not just into one piece of the puzzle, but into how all the pieces work together and interact with each other.