Connect Arduino to internet over USB (with Processing) - Simple Space Weather meter example (Part 1)

The video tutorial explores how to connect an Arduino to the Internet without using Wi-Fi or Ethernet, by utilizing a USB connection to a computer. It demonstrates a project that retrieves space weather data from the NOAA website and uses it to control LEDs on the Arduino. The tutorial covers setting up the project, using the Processing IDE, and implementing the necessary code to achieve this functionality.

How does the Arduino board respond to incoming serial data according to the text?

What are the two principles the speaker likes to keep in mind when starting a project?

What is the significance of using the Processing IDE in this project?