Action Hook: Fires inside the ‘bp_setup_cache_groups’ function, where cache groups are registered.

Action Hook: Fires inside bp_register_member_types(), so plugins can register member types.

Action Hook: Fires inside the ‘bp_register_widgets’ function, where plugins should register widgets.

Action Hook: Fires inside the ‘bp_setup_title’ function, where plugins should modify the page title.

Action Hook: Fires inside the ‘bp_setup_admin_bar’ function, where plugins should add items to the WP admin bar.