To enable Zopim you need to first signup with
Zendesk (formerly Zopim).
After signing up you will get a code similar to the screenshot below.

Text marked in yellow will be your Zopim id. Copy the id.
Go to Advance settings-> apps in your StoreHippo dashboard. Install the Zopim app.
In app settings, enter the Zopim id copied above and save.