Whether you own a blog or a website, fast user response in terms of quick load time and inter page navigation is a must for higher search engine rankings and better user experience.
Today's smart search engines give very high importance to load time of a website beside considering other important factors that enhances user experience. Hence it is important to understand how fast is the performance of your website and what are the areas that needs improvement.
Among several free website load testing sites online, PageSpeed by Google is undoubtedly the best of the lot just because of it's simplicity and prioritization of areas which needs improvement.