Google Chrome allows to create separate user profiles. Creating multiple user profiles will enable you to separate your chrome preferences like themes, bookmarks, settings, etc from others' on the same computer. You can keep your favorite themes, apps and extensions intact by enabling this feature. Chrome creates a separate copy of itself for the multiple users you create.
For example, If you're 4 members in your family say You, Your wife, Mom and Dad. You can create a 4 separate profiles, one for each of you. As a result, now each of you will have a separate copy of Chrome browser itself. Each user's history, bookmarks, themes, apps and extensions will be treated as per respective users settings. If you've, for example, installed a Readability Extension then it will be available in your profile only. Other members will need to install the same if they want.
The other big advantage is that you can login and access to your multiple web accounts for the same website. If you've 2 facebook account then you can access both simultaneously using 2 different Chrome user profiles! Doesn't this super cool?









