Whether you optimize your pages for organic results or play the pay-per-click game, it is crucial that you know what are the keywords or phrases that will attract the right visitors, especially in such a competitive environment as the online employment market.
There are several free keyword tools that can help you build relevant traffic: while Adwords and Overture offer free keyword tools that cover results for Google and Yahoo, there are also more extensive -- paying -- services such as Wordtracker.com and Keyworddiscovery.com that will give you a more accurate analysis of global keyword traffic; and if you're looking for a free all-in-one keyword solution, you can use sites such as Nichebot.com that gather sample results from these 4 keyword tools.