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Optimized.app > Left Navigation Bar > Organizational Settings > Contact Attributes
1. Follow the above-mentioned workflow to land on the Attributes grid.
2. Click the + Create Attribute button. Doing so opens the Add Attribute popup.
3. Here, use the Name field to enter the name of the attribute.
4. Select the type (String or Number) of the attribute using the Type dropdown.
5. Once the required information is filled, click the Add button.