The W3-ChaT workshop is focused on addressing existing challenges we are facing today on the Web (and in general on Internet). Solutions of such challenges are crucial to support/improve smooth experience of users with the Web as well as their decision making. Web challenges are strongly associated with intelligent algorithms of various kind and purpose acting as clever solutions simplifying many tasks such that mining users' data and relevant data sources with associated semantics, extracting users' contexts and predicting their interests leading to improved data providers, user experience and semantics as proper knowledge representations.