Though, Chrome does not have built-in support for multiple user profiles like Firefox, but there is a trick to create and use multiple separate user profiles with Google Chrome. See this tutorial for more information. I was looking for a better solution to create and MANAGE user profiles in Chrome – and finally got a perfect answer: ChromeDeck!
ChromeDeck is a freeware and Windows-only tool, which simplifies the task of creating and managing separate user profiles for Google Chrome. You need Microsoft .NET Framework 4 to use it. After downloading and installing ChromeDeck, launch it to create and manage user profiles.

The user interface of ChromeDeck is similar to the profile management wizard of Firefox. Additional feature is the option to create shortcuts on desktop and taskbar – which enables users to create and delete shortcuts for different user profiles on windows desktop and taskbar with a single click.
Hence, creating and managing separate user profiles for Google Chrome is very simple with ChromeDeck. A must have application for all Chrome users! :)
Link: Download ChromeDeck
What Is A User Profile?
Browsers save your personal information such as bookmarks, passwords, installed add-ons/extensions and user preferences in a set of files called user profile. It is similar to the user accounts on your computer. It is generally adviced to have separate user profiles for every user on shared computers. (Thanks pete)
Also see: Create multiple user profiles in Firefox
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