What’s the difference between UTF 8, 16 and 32

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I’m learning the basics about computers and got to see about Unicode. Apparently it can be divided in 3 with UTF (Unicode Tranformation Format) which would be UTF 8, UTF 16 and UTF 32. I understand that each one has different value UTF 8 – 1B; UTF 16 – 2B; UTF 32 – 4B. But I don’t understand beyond how much space each one of them takes what’s the difference between one and the other?

Also, apologies if I got any concept wrong :$ Feel free to correct me if I did

In: Technology