Web sites. These robots scan through the website

analytics is the assessment of a variety of data to help create a generalized
understanding of the visitor experience online. The measurement, collection,
analysis, and reporting of internet data for purposes of understanding and
optimizing web usage. Web analytics strategy adapts to the evolution of the web
and dramatically expands the type of data available that will help to achieve
strategic business objectives.

Web analytics data come
from a variety of sources, they are:



Web traffic data reports

Web server performance data reports

Web transactional data reports

Usability studies

User-submitted information and related


The two important
actors are playing vital role in collecting information, they are cookies and


Unique identifier
stored in browser files that allow the site to recognize a visitor and adapt content;
usually has an expiration date and does not include personal information.


Small set of JavaScript
code that sends a record to the web log; includes page, user, and action information
and can be programmed to draw out custom information as well.

Robots are the tools that many web search engines such as
google, yahoo use to build their databases. These robots work like web browser
except that they don’t require user interaction. Search robots are also known
as bots, wanderers, spiders and crawlers. Robots
access web pages, often using links to locate and link to other sites. These
robots scan through the website and tell the search engine exactly what
information is on the page and what information people are searching in the
search engine.

Visitor is a term used in web analytics that refers to the
number of distinct individuals requesting pages from the website during a given
period. Here the visitor’s IP address is considered to identify whether the visitor
is visiting the web page or website for the first time and in that case visitor
is considered to be unique visitor. Each visitor to the site
is only counted once during the reporting period, so if the same IP address
accesses the site many times, it still only counts as one visitor.

Cache refers to storing the visitor results from the
search operation performed by the visitor, when the user is looking for particular
web page information in the website for the first time. It refers to an end
user feature that makes navigating through the web pages much smoother. Page
cache helps in retrieving the search results of the visitor much faster by storing
the information of the visitor with the help of cookies. 


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