Alexa as Amazon.com subsidiary in California, provides information about the level of user visits a website via its web site, alexa.com. Alexa was founded in 1996 by Brewster Kahle and Bruce Gilliat. Basic estimates obtained for a web site from a large number of unique users who accessed the website for current Alexa algorithm program.
System:
1. The lower the Alexa ranking of the value of a website, the more crowded the user visits the site website.
2. Ranking of a website based on the measurement of reach and pageviews. Reach is measured by looking at the number of global Internet users who visit the site while Pageviews are the total number of Alexa users are requesting the URL of a site. Request URL repeat of one user on the same day will be counted as a single pageview.
3. There is also a saying that no matter how long visitors stay and explore your website, also included in the calculation Alexa.
4. Alexa calculations by default by 3 months, but included also display calculations 7 days and 1 month.
5. Alexa rank only on the primary domain only (eg http://http://luciusparker.blogspot.com/). So all subdomains and other pages keep up the value of the primary domain only. However, as an exception, that this does not apply to users of wordpress blog (http://xxx.wordpress.com) and blogspot (http://xxx.blogspot.com), that at first, the value of alexa still follow the main domain, but as time goes by, the value of the specific alexa for each subdomain. Maybe there are more than 2 provides additional blog.
