First, create a SiteW WhatsApp Chat widget on Common Ninja.
On the widgets catalog, find the WhatsApp Chat and enter the Editor.
When you're done creating the WhatsApp Chat widget, click on the Save Changes button at the right top corner of the editor.
If you don't have an account on Common Ninja, you'll have to register first.
When you're ready to add the WhatsApp Chat widget to your SiteW website, click the Add To Website button at the top bar of the Editor.
On the window that opens, click the Copy Icon to copy the widget embed code. In the next steps, you will paste this code into your SiteW [site_type].
Now, let's head to your SiteW website's editor.
In the SiteW editor, select the Embed widget on the left panel.
Drage the Ebmed widget and place it on your page wherever you wish the WhatsApp Chat will show.
In the window that opens, select the HTML Code option.
Now, in the Code window simply paste the WhatsApp Chat embed code you've copied before.
Toggle and activate the Direct Embed option, to show the WhatsApp Chat's content in the SiteW editor.
Click the Save and Close button at the right bottom corner of the window.