First, create a YouCan Marketing Button widget on Common Ninja.
On the widgets catalog, find the Marketing Button and enter the Editor.
When you're done creating the Marketing Button 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 Marketing Button widget to your YouCan store, 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 YouCan [site_type].
Now let's head to your YouCan editor.
In the YouCan editor click the Store button on the left menu.
Select the page you want to add the Marketing Button from the pages list.
Click on the Code View icon at the top of the content window, to enter the HTML code.
Now, in the HTML code simply paste the Marketing Button embed code you've copied before.
Click again on the Code View icon, to toggle back to the content view.
Click the Save button at the bottom right corner of the window, to save your changes.
Please note: the Marketing Button content will not show on the YouCan editor and will only show on the published store.