Qlik Sense is a data visualization tool that allows users to extract and plot data from databases in interactive formats like charts, graphs and tables. It takes analytics to a new level of power and flexibility by compressing data to 10% of its original size and enabling faster calculations. Some key features include the ability to create customized reports and dashboards, drill down into data on charts, and access applications on desktops or mobile devices. Qlik Sense has advantages like faster and scalable analysis, more exploration capabilities, and the ability for users to build their own dashboards. It is used across several industries for business intelligence.