I am looking to target a particular audience of parents, people planning children, or who have an interest in pregnancy, birth, or the first year of a new babys life. Is there any way of doing this?
It's important that you set up a Google webmasters account and one for Bing too and verify your blog ownership with the major search engines. http://en.support.wordpress.com/webmaster-tools/
It's important to create an informative About page that includes a blog description > http://onecoolsitebloggingtips.com/2011/04/06/why-about-pages-are-essential/
It's likewise important to create an effective tagline of a length that search engines will display > http://onecoolsitebloggingtips.com/2009/06/22/creating-an-effective-blog-tagline/
Tags and categories are the index terms that are indexed by search engines and will produce your posts in search engine results when people look for posts by typing those terms into search engines. Successful blogs draw between 30 - 60 % of their incoming targeted readers. from search engine referrals.
Targeted readers are different from casual traffic. Targeted readers arrive on your blog in response to SERPS (search engine page results) knowing the subject matter they are searching for will be found in your posts (assuming you have used relevant tags). Targeted readers are more likely to become regular readers and subscribers and leave comments on your posts. They are also more likely to backlink to your posts in posts of their own and when they do your blog will receive visitors who click the links. Targeted readers are also more likely to share the URL to your blog with other targeted readers in the same niche.
If you want your posts to receive search engine attention, be indexed and appear in the SERPS, and incoming targeted readers, receive backlinks, and you want your blog to achieve authority in your niche so it does achieve a PageRank then learning how to tag and categorize your posts accurately is important.
tags > http://en.forums.wordpress.com/topic/tags-29?replies=32
see also > increase traffic > http://en.forums.wordpress.com/tags/increase-traffic
The most effective way of drawing targeted readers to your blog is to seek out similar blogs in the same niche and comment, comment, comment on their posts. You can use the global tag pages to do this > http://en.support.wordpress.com/global-tags/