CSS Display

The display is an attribute of CSS that is used to specify the display behavior of an element.

h1{
    display: value;
}

Some of the different display values, 

h1 { display: none; }
h1 { display: inline; }
h1 { display: block; }
h1 { display: inline-block; }
none,

The element is completely removed from displaying on the web page.

inline,

Displays an element as an inline element (like <span>). Any height and width properties will have no effect.

block,

Displays an element as a block element (like <p>). It starts on a new line, and takes up the whole width

inline-block,

Displays an element as an inline-level block container. The element itself is formatted as an inline element, but you can apply height and width values.