The BuddyPress plugin adds multiple social functionalities to WordPress, inluding user profiles, groups and the front end user registration page. Bimber comes with an extensive BuddyPress integration, including additional What's your reaction, Snax and MyCred functionalities.
The plugin is available for free in wordpress.org repository. You can download it or install directly from the WP admin panel › Plugins › Add new panel.
As any other plugin from wordpress.org site, when new version of the plugin is available, you will be notified about it directly in your Dashboard.
All you need to do to activate the plugin. You can then enable/disable our additional modules in WP admin panel › Settings › BuddyPress. You can also change the look of the BuddyPress pages in WordPress Admin › Appearance › Customize › Plugin integrations › BuddyPress
You learn more about BuddyPress in the official BuddyPress Codex.