The Page Builder allows you to develop unique page layouts to best display your content.
When you create a new page, the content blocks will include the Row Creator tool:

Click the blue plus icon to show the six options for creating a new row of content blocks:

Click an option to create a new row of content blocks:

To delete a content block, hover over the Row Creator tool and click the red ‘X’ icon.
Content blocks will automatically shift their positions to reflect your deletion.