Winning, or at least participating in the digital game has become a growing endeavour for firms across most industries. With 40,000 Google searches queried every second, demonstrating domain expertise online has become a scalable channel for differentiating from competitors. 

Understanding in detail not only the performance of your brand's online presence, but also that of your competitors, are both core elements toward executing a successful digital strategy. 

Kissmetrics - the company that provide marketing analytics and conversion optimisation solutions - have provided a breakdown of the top 25 tools and gadgets to help spy on your competitors.

Although the topic has connotations of 'industrial espionage', the article provides a great overview of the different channels whereby companies can obtain online insights. From Google Alerts which allows you to browse keywords on the web, to SpyFu which enables the monitoring of competitors' AdWord usage, one can attain relatively quickly attain a comprehensive breakdown of the tools available.