It is useful to use a tool like this to have a view of data at a point in time. You can extract and create little data sets that you can store, and then over time, you can have a view for tracking changes. Especially when you work with a relational database or a database that's a production database, the data is dynamic, but if you use QlikView, you can take a snapshot of different datasets. In your own time, you can then get insights and report, build, analyze, and draw whatever you need from the data, which is quite useful.
