If you have connected Zelo and Slack, you have probably noticed a new app under your Slack Workspace's apps category. You can rename the app to better match your audience.
Open the Slack app's configuration
Right-click the Zelo app in the left menu, and choose "View app details".
This opens a more detailed dialog. Click "Configuration" to continue.
Update the bot's name
Under "Bot User," click the "Edit" button.
Enter a new name and save the changes.