Content rules determine what happens if the number of recommended items does not fill your recommendations design . It is possible for Recommendations criteria to return fewer recommendations than your design calls for. As an example, if your design has slots for four items, but your criteria causes only two items to be recommended, you can leave the remaining slots empty, or you can use backup recommendations to fill the extra slots.
- (Optional) Slide the Partial Design Rendering toggle to the "on" position.As many slots as possible will be filled but the design template might include blank space for remaining slots. If this option is disabled and there is not enough content to fill all available slots, recommendations are not served and default content is displayed instead.Enable this option if you want recommendations served with blank slots. Use backup recommendations if you want recommendation slots to be filled with content based on your criteria with empty slots filled with similar or popular content from your site, as explained in the next step.
- (Optional) Slide the Show Backup Recommendations toggle to the "on" position.Fill any remaining empty slots in the design with a random selection of most-viewed products from across your site.Using backup recommendations ensures that your recommendation design fill all available slots. Suppose that you have a 4 x 1 design, as illustrated below:Suppose your criteria causes only two items to be recommended. If you enable the Partial Design Rendering option, the fist two slots are filled, but the remaining two slots remain empty. However, if you enable the Show Backup Recommendations option, the first two slots are filled based on your specified criteria and the remaining two slots are filled based on your backup recommendations.The following matrix shows the result you'll observe when using the Partial Design Rendering and Backup Recommendations options:Partial Design RenderingBackup RecommendationsResultDisabledDisabledIf fewer recommendations are returned than the design calls for, the recommendations design is replaced by default content and no recommendations are displayed.EnabledDisabledThe design is rendered, but may include blank space if fewer recommendations are returned than the design calls for.EnabledEnabledBackup recommendations will fill available design "slots," fully rendering the design.If applying inclusion rules to backup recommendations restricts the number of qualifying backup recommendations to the point that the design cannot be filled, the design is partially rendered.If the criteria does not return any recommendations, and inclusion rules restrict backup recommendations to zero, the design is replaced with default content.DisabledEnabledBackup recommendations will fill available design "slots," fully rendering the design.If applying inclusion rules to backup recommendations restricts the number of qualifying backup recommendations to the point that the design cannot be filled, the design is replaced by default content and no recommendations are displayed.For more information, see Use a backup recommendation .
- (Conditional) If you selected Show Backup Recommendations in the previous step, you can enable Apply inclusion rules to backup recommendations .Inclusion rules determine which items are included in your recommendations. The options available depend on your industry vertical.For more details, see Specify inclusion rules below.
- (Optional) Slide the Recommend Previously Purchased Items toggle to the "on" position.This setting is based on the productPurchasedId . The default behavior is to not recommend previously purchased items. In most cases you do not want to promote items a customer has recently purchased. It is useful if you sell items that people typically purchase only once, such as kayaks. If you sell items that people come back to purchase again on a repeated basis, such as shampoo or other personal items, you should enable this option.