Acknowledgements Online marketing is a fast-changing subject. With every day that passes someone comes up with a new technology, a fresh idea for new technol- ogy, or an original approach to using existing technology. All of it can help marketers reach their audiences more successfully. All of it matters. For this reason no one person can ever hope to be the sole authority on the subject. No matter how deeply they immerse themselves in the world of online marketing, there will always be a brilliant new idea they miss. The idea of this book is to give you as many brilliant ideas as possible to help you market your products and services more effectively. So in researching this book I spoke to as many online marketing experts as I could find. I spoke to leading authorities on everything from website design, search mar- keting, online advertising, all the way through to mobile marketing and the