Internet advertising does work - here are 9 of the most effective campaigns of this year to prove it

Ask anyone if they've intentionally clicked on an ad on the internet, and the answer you'll get is probably "no."

The average click-through-rate on display ads in the US is just 0.06%, according to Google. But many creative digital marketing campaigns do manage to break the mold.

To celebrate digital ad creativity and effectiveness, US trade body the Interactive Advertising Bureau has released its second annual "Global Insights Report: What Works and Why."

The study looks at 24 award-winning campaigns from around the globe, from brands such as Heineken, Puma, Volkswagen, and more. Each of the report's case studies includes commentary from big-name agency and brand marketers.

Take a look at nine of the best digital ads of 2015, and find out why they worked so well.