Paperlike is actually the brand name for this type of screen protector, but the paper-feel category of screen protectors essentially adds extra screen texture to your device screen, and creates a slight resistance between the screen and pencil, just like real paper does. So with one of these screen protectors applied, it's easier to control your strokes and get smooth lines.
Other benefits of using paper-feel [rotcetors include fingerprint resistance, plus some are coated with anti-blue light filters which protects your eyes strain after staring at screens for long hours. The texture enhancement is also super helpful for creatives who work on a glossy iPad screen.