HTML5 provides 6 types headings. 

Header 1 : < h1 > Text < /h1 >

Header 2 :  < h2 > Text < /h2 >

Header 3 : < h3 > Text < /h 3>

Header 4 : < h4 > Text < /h4 >

Header 5 : < h5 > Text < /h5 >

Header 6 : < h6 > Text < /h6 >

Header Information

Unvisited link - It is displayed, underlined and blue. 

Visited link - It is displayed, underlined and purple.

Active link - It is displayed, underlined and red.