The Pro version of the plugin offers several advantages over the free edition found on WordPress.org :

This allows you to customize the Admin Bar (the top horizontal bar). You can hide unnecessary links like the WordPress logo, reorganize items, or add your own quick-access shortcuts.

Customizing the WordPress Dashboard: A Guide to Admin Menu Editor Pro v2.18 & Addons

Essential for agencies, this module lets you replace the default WordPress logo and text with your own company branding, creating a "white-label" experience for clients.

The addons package often includes additional modules that expand the plugin's reach beyond the sidebar: