Search Files, Applications in Ubuntu

How to search applications, files or folders and settings in Ubuntu?

Explanation

To search applications, settings, files or folders in Ubuntu, follow any of the options given below,
Option 1: Press Windows icon in the keyboard or switch to desktop.
Option 2: Click Activities in the top left corner.
In the search box type the required keyword to search and press the "Enter" key.

In the below image, search box provides the search results for the keyword "settings".