What are the disadvantages of Alexa ranking?
There are several disadvantage of Alexa ranking. is that depends on the Alexa toolbar.
Not everybody has the Alexa toolbar installed, so there might be millions of Web sites that, even if they have a lot of traffic, will not be ranked (or not high enough) by Alexa. It is rather relative.
Fairly small sample size of audience (those that have the Alexa toolbar installed) to measure marketing efforts
Due to the small sample size, there are millions of websites that may get a lot of traffic but are not ranked by Alexa.
Many people feel that Alexa traffic can be “gamed” to therefore show inaccurate results.
Many people say that it is inaccurate and that Alexa traffic can be greatly influenced (or “gamed”, as some prefer to call it).
Subdomains are not ranked separately, and neither are subpages within a domain. The overall traffic is calculated for the top-level domain only.
Alexa tollbar is only available on firefox and IE browser.