Some time after the launch of your blog, you will be able to determine in several ways what problems your audience has. One
A very useful method, when readers themselves do not tell you about their needs and problems, is to see how they came to the blog (and what they did after).
Analyze the search queries that visitors came to your site. Sometimes it is very useful.
For example, in my Twitter microblog I have a plugin that collects statistics. Maybe not as powerful as the rest, but he
able to show what key search phrases people came to my site. Here is a screenshot of a series of these keywords:
These are just ten of the hundreds of phrases that people type into the search bar
Google? And from them one can understand what exactly interests people.
The same information can be gathered from most collection packages.
web stats such as google analytics.