Working effectively with ctags has always been a topic I missed for a long time because I was too lazy to invest time to learn about the it.
I was working on on my application and was constantly consulting Padrino's API doc in the browser. It would have been more effective if I can do the searching directly the Padrino's code on GitHub. Benefit I don't have to leave the terminal and can focus on my task.
ctags is a tool which make it easy for you to shift through in no time.