Before setting up a live chat, you need to create an account on Google Tag Manager, And link it to your store.
Go to getbutton.io
Copy your page URL
Click on Get my Facebook page ID
Add your page URL then click on Get ID and your page ID will be added automatically
To add WhatsApp widget, add your WhatsApp number including your country code
Customize your button
Add your email, then copy your code
Open your Tag Manager account and click on New Tag
Click on Tag Configuration
Click on Custom HTML
Paste your code here
Click on Triggering and select All Pages
Rename your tag then click Save
Click on Submit, Publish and Skip
Login to your Wuilt account and preview your store to find the widgets