| Alexa Traffic History Graph
| About the Alexa Traffic
3 Months Graph
- 3 Month Average Traffic Rank: 1,263,119
- Speed: Very Fast (83rd percentile)
- Online Since: September 27, 2002
- United States 87.7%
- Other Countries 11.6%
- Average Customer Review:
Alexa computes traffic rankings by analyzing the Web usage
of millions of Alexa Toolbar users. The information is sorted, sifted,
anonymized, counted, and computed, until, finally, we get the traffic rankings
shown in the Alexa service. The process is relatively complex, but if you have
a need to know, please read on.
What is Traffic Rank?
The traffic rank is based on
three months of aggregated historical traffic data from millions of Alexa
Toolbar users and is a combined measure of page views and users (reach). As a
first step, Alexa computes the reach and number of page views for all sites on
the Web on a daily basis. The main Alexa traffic rank is based on the geometric
mean of these two quantities averaged over time (so that the rank of a site
reflects both the number of users who visit that site as well as the number of
pages on the site viewed by those users). The three-month change is determined
by comparing the site's current rank with its rank from three months ago. For
example, on July 1, the three-month change would show the difference between
the rank based on traffic during the first quarter of the year and the rank
based on traffic during the second quarter.
What are sites and Web hosts?
Traffic is computed
for sites, which are typically defined at the domain level. For example, the
Web hosts www.msn.com, carpoint.msn.com and slate.msn.com are all treated as
part of the same site, because they all reside on the same domain, msn.com. An
exception is personal home pages, which are treated separately if they can be
automatically identified as such from the URLs in question. Also, sites which
are found to be serving the "same" content are generally counted together as
the same site.
What is Reach?
Reach measures the number of users.
Reach is typically expressed as the percentage of all Internet users who visit
a given site. So, for example, if a site like yahoo.com has a reach of 28%,
this means that if you took random samples of one million Internet users, you
would on average find that 280,000 of them visit yahoo.com. Alexa expresses
reach as number of users per million. Alexa's one-week and three-month average
reach are measures of daily reach, averaged over the specified time period. The
reach rank is a ranking of all sites based solely on their reach. The
three-month changes are determined by comparing a site's current reach and
reach rank with its values from three month ago.
What are Page Views?
Page views measure the number
of pages viewed by Alexa Toolbar users. Multiple page views of the same page
made by the same user on the same day are counted only once. The page views per
user numbers are the average numbers of unique pages viewed per user per day by
the users visiting the site. The page view rank is a ranking of all sites based
solely on the total number of page views (not page views per user). The
three-month changes are determined by comparing a site's current page view
numbers with those from three month ago.
How Are Traffic Trend Graphs Calculated?
graph shows you a three-day moving average of the site's daily traffic rank,
charted over time. The daily traffic rank reflects the traffic to the site
based on data for a single day. In contrast, the main traffic rank shown in the
Alexa Toolbar and elsewhere in the service is calculated from three months of
aggregate traffic data.
Daily traffic rankings will sometimes benefit sites with
sporadically high traffic, while the three-month traffic ranking benefits sites
with consistent traffic over time. Since we feel that consistent traffic is a
better indication of a site's value, we've chosen to use the three-month
traffic rank to represent the site's overall popularity. We use the daily
traffic rank in the Trend graphs because it allows you to see short-term
fluctuations in traffic much more clearly.
It is possible for a site's three-month traffic rank to be
higher than any single daily rank shown in the Trend graph. On any given day
there may be many sites that temporarily shoot up in the rankings. But if a
site has consistent traffic performance, it may end up with the best ranking
when the traffic data are aggregated into the three-month average. A good
analogy is a four-day golf tournament: if a different player comes in first at
each match, but you come in second at all four matches, you can end up winning
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