Your Arduino kit comes with an infrared receiver module and a remote control emitter that can be used to communicate button presses on the remote control.
The receiver module is a photocell that is tuned to “listen” to infrared light signals that are modulated at 38 kHz.
The remote control sends specific patterns of binary light pulses, depending on the button pressed, which the receiver decodes.
See Elegoo Kit Lesson 13 for more details, including the Arduino sketch. The “IRremote” library, provided in the tutorial files, must be installed before compiling the program.