Log into the site editor and click ‘Insert’ from the top toolbar.
From the left side bar, choose 'Google Maps' under the 'Widgets' section.
Add your address or postcode and set the zoom level. You'll be able to see a live preview in the panel.
Click 'Apply' and save your changes, then click 'View my site' in the top right corner to see the map on your live site.
NB: You can easily resize maps by dragging out the corners of the snippet on the page.