It is recommended for a campaign not to be modified during the first four weeks following any change, giving the algorithm sufficient time to collect feedback and implement machine learning. After this interval, you may analyze and optimize your results.

This analysis is performed starting from a Department-level performance diagnostic, followed by the Categories and Subcategories advertised during a campaign. Thereafter, you can simply remove the underperforming Categories or Subcategories.

This article will shed light on how to optimize campaign starting from the removal of inefficient Categories. However, in the same way that a Department can be divided into several Categories, so too can any Category be subdivided into Subcategories.

Consequently, campaign optimization can also be performed by removing Subcategories, as long as this makes sense for the campaign's strategy.

1. In the upper right corner of the screen, click on Campaign Audiences;
2. Select the Smart Shopping campaign you want to optimize;
3. Click on choose inventory;
4. In the status column, click on the blue "+" icon;
5. From the subdivision selector, choose the VTEX category option;
6. Click on Product Groups to select all categories;
7. Click on Save subdivision.

You'll see a performance overview by product category.

Check very spreadsheet line to see if the cost is agreeable based on the conversion numbers and each category's ROAS.

To remove underperforming categories, follow these steps:

1. On the line of the chosen category, click on the blue pencil icon;
2. Select the Excluded option;
3. Click on Save.

Your category will no longer appear in the campaign.