In html5 utf-8 stands for . What's it's actual work??? Anyone?

Answer 1

Characters corrisponds to numbers, utf-8 is just a character table standart https://code.sololearn.com/cW28i6z2Dy8T/?ref=app

Answer 2

UTF8 is an encoding for characters as computer have no glue about such things except 0 and 1. So you need a convention (encoding) how to represent a letter. UTF8 is only one of many (others are ASCII, LATIN1, ...). Same is true for Numbers (Natural, Decimal. Floating, ...) but there are other standards to handle them.