Grouping: Selectors can be grouped having the same values of property and the code be reduced.
E.g. :
h1 {
color: blue;
}
h2 {
color: blue;
}
p {
color: blue;
}
It can be seen from the code that every element shares the same property. Rewriting can be avoided by writing each selector separated by a comma.
Nesting: Specifying a selector within a selector is called nesting.
P
{
color: red;
text-align: left;
}
.marked
{
background-color: blue;
}
.marked p
{
color: green;
}
anand.johari1994