What are "expression-based" visualizations in Qlik Sense?

Expression-based visualizations in Qlik Sense utilize dynamic calculations that are defined by user-created expressions. This approach allows users to customize their visualizations according to their specific analytical needs and data contexts. Users can create powerful, flexible expressions to manipulate and interpret the underlying data in real-time, which enhances the interactivity and depth of the data analysis process.

The ability to define expressions means that users can calculate sums, averages, counts, and other statistical measures on the fly. This dynamic capability is essential for business analysts who need to derive insights and make decisions based on ever-changing data. The interactivity of these visualizations allows for deeper explorations of the data, enabling users to gain various perspectives based on their unique criteria and requirements.

In contrast, visualizations that are generated automatically without user input do not provide the same level of customization and flexibility. Fixed formulas restrict the adaptability of the analysis, while pre-set templates limit the user's ability to tailor the insights to their specific business questions. Hence, the dynamic and flexible nature of expression-based visualizations is why this answer is the correct choice.