Free Directory Submission websites are a easiest & fastest way to get backlinks. When there was no Search Engines in internet world Directories was used to get different websites in different categories.People uses Directories to get info about new websites as there was no Search Engine or search engine were limited . these days Search Engine Dominates but Directorates still have importance regarding Search Engine optimization . We can get free Backlnks & traffic from these Free directories websites. We need to avoid bad quality stuff & only need to use only quality one that add some link juice to our Link building Strategies.
If you are working for client from Australia than getting Directories links from com.au domains will help a lot & boost your Link profile very quickly.