transient is used to specify which properties of an object will not be saved or serialised. For example, when saving an object to a file, transient specifies which properties or attributes will not be saved to that file when that object is saved to a file.
When the object is re-created from the file, the value of that transient attribute (or private property) will not be re-created as it was never saved, or serialised to that file. In some cases, you may want to avoid persisting some of these private instance variables or attributes of an object, transient allows you to do that.
