Which tool is designed to create or update columns in Alteryx using expressions?

The Formula Tool is specifically designed for creating or updating columns in Alteryx utilizing expressions. This tool allows users to define new columns or modify existing ones based on various calculations, string manipulations, or logical expressions. Users can enter expressions to compute values dynamically, enabling a flexible and powerful way to enrich datasets with derived information.

Other tools serve distinct purposes that do not involve direct creation or updating of columns through expressions. The Join Tool, for instance, is focused on combining two datasets based on matching fields, while the Output Data Tool is used for exporting data to a specified format or location. The Browse Tool is for viewing and inspecting data outputs, ensuring understanding of dataset structures but not for altering them. Therefore, the Formula Tool stands out as the most appropriate choice for the specified function.