Let’s take a simple example.
We have three pages; Apple, Pear, Orange
We will create three widgets; one with an image of an apple, one with an image of a pear, and one with an image of an orange.
For the apple widget, we will hide it on the pear and orange pages.
For the pear widget, we will hide it on the apple and orange pages.
For the orange widget, we will hide it on the apple and pear pages.
And you can do this with images, text, custom widgets, search forms, login widgets…
The possibilities are pretty limitless.