The paper presents Benford’s Law, also called the first digit law, stating that in lists of numbers from many real-life sources of data the leading digit is distributed in a specific non-uniform way. The essence, properties, constrains as well as examples of Benford’s Law practical uses have been shown. It has been proposed to build a Web 2.0 site (vertical portal) where results of different data set analyses could be reported and presented in a unified way, in the context of their agreement with Benford’s Law.