Effective public relations is an ongoing process in which the reception of what you’ve put out before must influence your plans going forward. Internet traffic data can go a long way in helping you to assess how much of an impact your strategy has had, whether positive or negative, and what factors in particular your audience has keyed in on.
Google Analytics, when properly filtered, can give you a clear picture of your overall traffic, internal search terms (and volume), and the flow of traffic through your site. Google Webmasters Tools can show you terms for which your site is ranking and getting clicks. These factors can help show you the impact of your message with your internet audience, and so enable you to craft a more effective message going forward.
Google Analytics can also show you where your traffic is coming from– which can help you determine what news sites are providing the best returns for your effort.