Clicker is useful during the first stage of your dog training session. Once your dog start to understand what you are trying to ask him to do, then no need to use the clicker anymore. Dog training using clicker will help to faster your dog training session, you can use a word instead of clicker actually but sometimes your inconsistency using the particular word tend to confuse your dog. But by using clicker your command will be consistent.

This is an article about dog clicker training-http://dogcareschool.com/?p=70

Danielle Chua
Dog Care School