What dot symbol mean?

Question

I can't understand the dot refers to what or why i must write it !!

Answer 1

which language?

Answer 2

. in CSS means it is a class and it can be applied to many elements.

Answer 3

To understand the lessons of the CSS course on sololearn, it is helpful to first know HTML. (Sololearn also has an HTML course.)

Answer 4

I learned HTML before

Answer 5

In CSS a dot denotes a class

Answer 6

Css