The 1:1 iPad Refresh of 2021 has brought the function of compatibility with the Generation 1 Apple Pencil. Apple Pencil expands the power of iPad and opens up new creative possibilities.
An Apple Pencil is more than just a stylus. In addition to being able to annotate using digital ink, opening applications, moving objects, and interacting with menus and more using the tip of the Apple Pencil, the device itself connects to the iPad using bluetooth and is pressure sensitive. This means that when used with an application built specifically to utilize the features of the Apple Pencil, the user can simply increase the width of a line of digital ink by pressing harder with the tip of the Pencil on the same way that you would with a paintbrush. Applications also recognize when the Pencil is in use and can be set up to only accept input from the tip, meaning a user now has the ability to rest her/his hand on the iPad itself while writing or drawing.
~ From The Next Tech Thing