Emmet

p10 - padding 10 px

 div.featured>h1+h2+p
 <div class="featured">
  <h1></h1>
  <h2></h2>
  <p></p>
 </div>

Text align center

tac

margin bottom

mb10

id

#myid

H1 with class

h1.myclass

More than 1 class

.class1.class2

Add Class and Id

#myid.myclass1.class2

Adding content

h1{My title}

Class and title

h1.red{my red title}