Tagging files within Mavericks has become more important. By tagging files you can quickly find those important documents within the future. Tagging files can be difficult particularly if you have a large number of files that you want to tag. By selecting the files and dragging them onto the tags within the sidebar you can quickly tag an entire folder of files. This is a better method than selecting the files and right clicking and selecting the tag.
I am using tags more and more often to find files.