Special part of installation of the Drupal commons involves increasing the following parameters in the PHP.
Maximum Execution time : 300
Maximum Input time : 240
Drupal commons won't install if above changes are not done.
Drupal commons is drupal with all the community features added in one single package.
It has lot of featured modules present for community website and community application.
Features tab : contains group of collective modules which we can use for different purposes