Question

To raise awareness of what you're advertising without limiting who might see your ads, you should:

Answer 1

To raise awareness of what you're advertising without limiting who might see your ads, you should add multiple targeting methods and use the "bid only" settings.

Answer 2

To raise the awareness of what one is advertising and without limiting  the viewers; this may be achieved by displaying your ads on the right websites whose viewers are in line with the content on your ads.

This will give your clienyts an easy time of meeting their expected demands from their working wesites thus accomplishing your objectives.