What functionality does the Data Cleansing tool provide?

The Data Cleansing tool in Alteryx is specifically designed to assist users in preparing their data by addressing common data quality issues. Among its key functionalities, it helps in removing unwanted characters from text fields, which is crucial for ensuring data integrity and consistency. Additionally, it can handle null values by either replacing them with specified default values or removing the records altogether, thereby enhancing the reliability of data analysis. This combination of features makes the Data Cleansing tool invaluable for users seeking to optimize their datasets before further processing or analysis.

In contrast, functionalities like visualizing cleaning operations or outputting directly to a new file are features associated with other tools or functions within Alteryx. Aggregating data is a separate consideration that typically involves summarizing or consolidating data, which is not the primary focus of the Data Cleansing tool. Therefore, the emphasis on the removal of unwanted characters and null values affirms why this answer is accurate.