Try to shrink the browser window, to view how the very long word in the paragraph below will break:

This is a veryveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryveryverylongwordthatwillbreakatspecificplaceswhenthebrowserwindowisresized.

Note: The wbr element is not supported in Internet Explorer 11 and earlier versions.