Sometimes single view is probably sufficient to display the details you need.
A view puts a focus on certain aspects like tasks or resources.
Depending on what information you better analyze, a particular view might be more helpful than other views.

At first the number of views that are available might feel a bit overwhelming.
Even the default view can get confusing for those who use Microsoft Project for the first time.
As you use it over time, though, you will get used to the views.

You will also eventually notice that they are customizable too.
More data is involved the larger the scale of a project is.