I usually describe this as a "visual query builder," for example user247245. At a simpler level, presentations can be useful at any time when you need a list of data objects (or their subcomponents) from your site (be it content, users, comments, etc.).
A view can be as simple as a single element; for example, if you want a classic story to be accidentally inserted into a block on the sidebar of each page. Views allow you to add filters (by creation date, by taxonomic term, etc.), designate displays (block, page, etc.) and output topic (at the display level, at the line level, etc.).
Most of the capabilities of Views stems from the fact that it integrates with a large number of other modules. He especially welcomes CCK , allowing you to flexibly display CCK fields as needed. And there are many other modules that add additional display types, such as lightbox slide shows , " , CSV export , JSON output , carousel , calendar , etc.
In short, if you plan to use Drupal, enough time will be spent on using Views.
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