You could easily integrate Slack to get notification. To enable this, just follow this steps:

• 1.  Login to your Slack account.
  
• 2. Click on 'Create new App' button from here: Slack Apps.
• 3. On modal window, enter your preferred App name. And select your workspace.

• 4. After creating the App, you'll get the App details page. You could configure the App from there like App icon and others.
  
• 5. Click on Add features and functionality, then Incoming Webhooks.

• 6. Activate Incoming Webhook.

• 7. Click on Add New Webhook to Workspace.

• 8. Then a new page will be appeared. Select your channel where you want to get the messages.
  
• 9. After submit, you'll be redirected to the previous page again. You'll find the Webhook URL there.

• 10. Copy the URL and add to CRM.