Plugin will create lots of users, messages, friends connections, groups, topics, activity items, profile data - useful for testing purpose.

Noted That:

To install correctly this bp-default-data.zip.
Fisrt Download the bp-default-data.zip to your computer
Extract/Open bp-default-data.zip to Your Computer.
Then, Find readme.txt file inside bp-default-data.zip and Open readme.txt.
Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
Then, Follow the the Tips Below.

Start the Tips:

1. First Download "bp-default-data.zip" Plugin to your Local Computer. (Click Download)

2. Then, Login to your "yourdomain.com/wp-admin" Dashboard.

3. Then, Click on "Plugins" + "Add New" from left sidemenu of Dashboard.

4. Now, Click on "Upload Plugin" button.

5. Now, Browse "bp-default-data.zip" Downloaded plugin from your computer, Where you downloaded bp-default-data.zip According to Step – 1 Above then, click on "Install Now"

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "BuddyPress Default Data" folder is added on left sidemenu. Now, Click on "BuddyPress Default Data" folder.

Noted that: If you do not see "BuddyPress Default Data" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

8. Now you configure yourself oR Watch video tutorial below about BuddyPress Default Data Configurtions and Settings or How to work "BuddyPress Default Data" in your WordPress site.

After Activated Plugin According to Step-6 then,

Go to "Plugins" + "Installed Plugin" from Wordpress Admin Panel Leftside Menu.
or Direct go to: https://yourdomain/wp-admin/plugins.php
Then, Find "BuddyPress Default Data" Activated Plugin from Plugin List.
Then, Click on "Settings" from Plugin that is BuddyPress Default Data
Now, Edit/Add/Config the setting and Click on "Save Changes" button,

Guide
Admin Installer via search Visit the Add New plugin screen and search for “buddypress default data”. Click the “Install Now” button. Activate the plugin. Navigate to the “Tools > BP Default Data” (if WP) or “Network Admin > Settings > BP Default Data” (if WPMS) menu. Admin Installer via zip Visit the Add New plugin screen and click the “Upload Plugin” button. Click the “Browse…” button and select zip file from your computer. Click “Install Now” button. Once done uploading, activate BuddyPress Default Data. Navigate to the “Tools > BP Default Data” (if WP) or “Network Admin > Settings > BP Default Data” (if WPMS) menu. Manual Upload the BuddyPress Default Data plugin folder to the plugins directory in your WordPress installation. Activate the plugin. Navigate to the “Tools > BP Default Data” (if WP) or “Network Admin > Settings > BP Default Data” (if WPMS) menu. That’s it!

Guide

Admin Installer via search

Visit the Add New plugin screen and search for “buddypress default data”.
Click the “Install Now” button.
Activate the plugin.
Navigate to the “Tools > BP Default Data” (if WP) or “Network Admin > Settings > BP Default Data” (if WPMS) menu.

Admin Installer via zip

Visit the Add New plugin screen and click the “Upload Plugin” button.
Click the “Browse…” button and select zip file from your computer.
Click “Install Now” button.
Once done uploading, activate BuddyPress Default Data.
Navigate to the “Tools > BP Default Data” (if WP) or “Network Admin > Settings > BP Default Data” (if WPMS) menu.

Manual

Upload the BuddyPress Default Data plugin folder to the plugins directory in your WordPress installation.
Activate the plugin.
Navigate to the “Tools > BP Default Data” (if WP) or “Network Admin > Settings > BP Default Data” (if WPMS) menu.

That’s it!

profile, items, activity, data, useful, purpose, testing, topics, groups, lots,

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Reffered: https://wordpress.org/