When I look at my blog stats to see what keywords people are finding me by, should I make a point to use those? I am getting traffic from people asking questions lately, so I was curious to know if using that information for new posts would be beneficial. One for example is:
"Is wii fit good for pregnant women"
Should I make a post on that?
Statistics on which search phrases are bringing traffic to which pages on your site are actually very useful in fine-tuning the SEO for an existing page. Occasionally, I like to re-evalute things like <title>, <h1>, meta description... and this information helps a LOT.
For example, if I notice that a URL http://www.example.com/auto-maintentence.html is getting traffic almost exclusively from searches for "car maintentance" even though my <title>, <h1> etc. are actually optimized for "auto maintenance", it's time to re-evaluate. A quick look at the page and it's backlinks might show me that the content on the page uses "car" frequently, and "auto" rarely. I might notice that most of the backlinks for the page has "car maintenance" or some slight variation using "car" as the link text. I might notice that "car maintenance" is MUCH less competitive than "auto maintenance" (not saying it is, just an example).
Since I obvioulsy don't rank well for "auto maintenance" because I get ZERO traffic from those types of search terms but DO rank well for "car maintenance" because I do get traffic almost exclusively from those terms, I might decide to tweak my <title>, <h1>, <h2>s and even links on other pages on my site to this page so that they target "car maintenance" primarily instead of "auto maintenance". If I already rank pretty well for "car maintenance", the additional on-page and on-site SEO for that phrase rather than "auto maintenance" could bring BIG rewards.
So I wouldn't say it's necessarily "chasing after the long tail" as much as it could be used very successfully for fine tuning your URLs' targeted keyword phrases to optimize traffic and rankings.