Let's look at some real-world Views examples:
→ two views block displays
Source: https://giving.cu.edu/
→ three views block displays
Source: http://leg.colorado.gov
→ one views page display (View #1)
→ one views block display (View #2)
Source: https://opensource.com
These examples illustrate that the Views system can produce both page displays and block displays.
Any Drupal page can contain one or more block displays, or views blocks as they are also often referred to.
As a general rule, any time you see lists of things on a Drupal site, it's likely you're looking at a views page or views block.
Activity 1
Consider this screenshot of the International Atomic Energy Agency's website (https://iaea.org).
→ click on the screenshot to see the full. original image.
Can you identify all the different view displays that are shown on the homepage?
Here's an annotated version of the screenshot that shows all of the views displays.