What is the function of synaptic package manager

Synaptic package manager is a graphical package management tool based on apt.In order to access the package manager in mate, click on menu, lower left corner of the window.Where is package manager in ubuntu?Search for packages by name, description, maintainer, version.Besides these basic functions the following features are provided:Some of the feature given by synaptic package manager are:

Reload by clicking the reload button in the menu bar at the time of opening.