Keyword blurring results when too many title tags within the same website confuse the search engine so that it is unclear which page contains the principle content for the keyword specified in the title tag.
HTML and dynamically-generated web pages must have unique title tags so that the search engine can easily index the web page. For example, if you have an ecommerce website where you sell fasteners, an aspect of search engine optimization would be to include an instruction that allows the application that dynamically generates each web page to create a unique title tag that says more than just ‘fasteners.’ An attribute would be associated with ‘fasteners’ such as ‘drawer fasteners’ or ‘heavy duty steel fasteners’ to ensure that both end-users and the search engines are clear about the content to be found on each web page.
Search engine optimization ensures you avoid keyword blurring by creating unique title tags for all your web pages, including those that are dynamically generated.