Here css also have comments and they used to explain the code and it will help you to edit the source code and also span for multiple lines. Here in the style rules has three parts 1.Selector 2.Property and 3.value according to the css the syntax’s are composed by the style rules and then applies to the corresponding element, common comments are easy to understand selectors type.
Basic Example:
p.small {
font-size: large;
}
p.medium {
font-size: large;
}
p.large {
font-size: large;
}