What feature searches the cells in a worksheet or a selected range for matches and then replaces each match with a replacement value of your choice?

The feature you are referring to is the "Find and Replace" function in spreadsheet applications like Microsoft Excel or google Sheets. This tool allows users to search for specific text or values within a worksheet or selected range and replace them with a specified replacement value. It streamlines the process of updating data by enabling bulk changes, enhancing efficiency and accuracy in data management.