In 2012, more than ever, knowing what your return on investment will be on your digital marketing strategy is crucial. Gone are the days when the finance director would sign off on an online marketing budget year on year without being able to measure success. Why? Because many companies didn't see a return and no-one quite knew why.

Many aspects of digital marketing are still looked upon as a dark art shrouded in mystery. Geeks are the new 'cool' because they're able to demystify what's happen...