HP 23" IPS Full-HD LED-backlit Monitor

What does

“Supports High-bandwidth Digital Content Protection (HDCP) to prevent transmission of non-encrypted high definition content”

mean, please?

Thank you.

https://en.wikipedia.org/wiki/High-bandwidth_Digital_Content_Protection

High-bandwidth Digital Content Protection (HDCP) is a form of digital copy protection developed by Intel Corporation to prevent copying of digital, audio & video content as it travels across connections.