You just installed Drupal or you have a site with standard settings. You can add articles and tag them. Now, would you like to introduce visitors to a page containing articles of a specific category, how to do this? You decided to put this idea aside and instead display all articles sorted by title. How to do it?
The fact is that not all functionality can be turned on immediately after installing Drupal. As a rule, all additional functionality is taken out of Drupal in separate modules. But do not rush to install a bunch of modules, first try the Views module.