Views are the way Gaby communicates with you (and vice-versa). This means that you enter data in a view and you read it back from a view (possibly different than the one you entered data in).
Since your data can be represented in several different ways there are several different views, each useful (hum hum) and dedicated to a particular task (forms are more appropriate to enter data than lists that are more appropriate to show lots of records at the same time, ...).
Forms are what the name stands for: forms. Without any fancy things about: it is just a list of fields you have to fill.
Actually they can be a bit fancier if you go to the preferences dialog and select items under "Specialized widgets". This allow to have calendar widgets to enter dates, big text area for memo fields, ...
Note: Would you want a screenshot here ?
They are really basic lists; much more interesting lists are the extended one from the next section...
This view shows every records in a list and allows quick search over any fields thanks to a text entry.
The scope of utility of the lists might seem a bit narrow at first but the interesting thing is that you can perform queries and got the result in those lists with the "Filter" window (which is in the views menu).
Note: The filter window should be fairly easy to grasp. (Right?)
Once you only have the records you want in a list you can print them (and only them) through the 'Selected records' checkbox in the print options.
Along the previously described views there are the specialized views, often only available for one kind of database (like the genealogy view).
There are certainly yet other views (since it is so easy to create them) but no documentation are available for them; you'll have to figure how they work yourself (possibly reading the different README in the source tree).