title: Web log analysis software
text: # Web log analysis software
  
  Web log analysis software (also called a web log analyzer) is a kind of web analytics software that parses a server log file from a web server, and based on the values contained in the log file, derives indicators about when, how, and by whom a web server is visited. Reports are usually generated immediately, but data extracted from the log files can alternatively be stored in a database, allowing various reports to be generated on demand.
  
  Features supported by log analysis packages may include "hit filters", which use pattern matching to examine selected log data.
  
  ## Common indicators
  
  * Number of visits and number of unique visitors
  * Visit duration and last visits
  * Authenticated users, and last authenticated visits
  * Days of week and rush hours
  * Domains/countries of host's visitors.
  * Hosts list
  * Number of page views
  * Most viewed, entry, and exit pages
  * File types
  * OS used
  * Browsers used
  * Robots used
  * HTTP referrer
  * Search engines, key phrases and keywords used to find the analyzed web site
  * HTTP errors
  * Some of the log analyzers also report on who is on the site, conversion tracking, visit time and page navigation.
  