Please Explain Audio CD (Red book) Technical details

Hi all,
I read this part on Wikipedia
“An audio CD can represent frequencies up to 22.05 kHz, the Nyquist frequency of the 44.1 kHz sample rate. The bit rate is 1411.2 kbit/s:
2 channels x 44,100 samples per second per channel × 16 bits per sample = 1,411,200 bit/s = 1,411.2 kbit/s.”
I don’t understand “samples,channels” meaning clearly.Can you explain it?:confused:
Maybe this question is stupid,but I’m newbie:)
Thank you