Define Viewport

Viewport in terms of web design is the visible area of the web page.

Using the following, we can set Viewport:

<meta name = "viewport" content = "width = device-width, initial-scale = 1.0">

Here, <meta>: instruct the browser to control the dimension of the web page 

          width = device-width sets the screen width

          initial-scale = 1.0 is the initial zoom level