Go to https://chat.zendesk.com/ and login to your Zendesk account
From the dashboard, go to Settings→ Widget.
Now click on the Getting Started button. And Copy the embed script.
Now paste the copied script to your website.
Here is how you can insert the code on your website:
Login to your Get me a shop Dashboard
From the left side of the menu, Select Apps → Zopim
The Zopim page will open with the script field.
Now in the script field, paste the code that you have copied in the above steps.
Once you have added the script, Tick on the Enable option and Save.