HTML title tags (< title >) are currently the most important on-page factor when optimising your webpages for search engine results. For the majority of search engines the title tag is the first point of call to summarise the theme of a webpage and to help rank that webpage accordingly within their listings. Obviously there are many other factors that generate the overall ranking but optimising your title tags right will generally provide results for your targeted search terms.
Target Individual Webpages Towards Search Terms