You will be prompted to sign in to your Google account in the new profile - this is an optional step that lets you sync your bookmarks, web history, and settings from computer to computer in Chrome.Choose a user icon and name your profile so it'll be easier to find (e.g., 'Brown Account' or 'Personal Gmail').
For example, in one window you might be looking at your Brown Gmail, Calendar, and Docs, and in another window you might be reading your personal Gmail and using YouTube and Blogger with your personal account. You can have a window open for each account. This is a great way to work with more than one Google account (for example, and accounts) in Chrome without having to sign in and out, or use incognito windows.