The advanced tab holds setting around what products to be displayed when there is no good recommendation available. At the moment Engage offers the following, "New Products", "Products on Sale", "Top Selling Products", "Top grossing products". The recommended setting here is automatic, since that will let give the user a more dynamic impression for the products affected.
Settings for Landing Page Block
Note, this setting should only be used when creating a block to be used for the landing page automation feature. If creating a block for standard recommendations, leave the field value as "Any source".
When creating a block to be used for personalized landing pages serving customers entering for an ads network, select the source that you would like to target. Currently Engage supports,