Unfortunately, until the 10.9 version release, OS X had not provided you with an option to add tags to your documents. For this reason, programs like Tagit were developed.
Tagit not only allows you to add tags to your files but also comes with a built-in search tool that helps you find documents by entering their tags as the keywords.
The utility lacks an integrated help guide, by the way, but you can easily find plenty of instructions on the homepage of the developer. All you need to do in order to add tags to your documents is to drag-and-drop the files over the app's icon from the dock and just enter the keywords.
An important advantage is that you can select multiple files and add your list of tags to all loaded documents. You can always alter the entered keywords or add recently used tags.
Another thing I like is the fact that you can use the integrated search tool to find documents on your Mac. You simply enter the correspondent tags and wait for the results.
In conclusion, it's worth installing Tagit on your Mac if you wish to add or alter the tags of your files. The app brings a simple-to-handle interface, supports the drag-and-drop action, and immediately applies the tag changes. Plus, you don't have to pay to use this program on your Mac.
