Stitching is a process that creates relations between assets representing the same data source: the data source of a Tableau report and the Data Catalog database. This allows you to clearly represent the lineage from the data source to the Tableau reports where it is used. As a consequence, you can easily perform impact analyses. For example, you can quickly see which reports will be affected if you refresh a table of your database, or which reports will be impacted if you drop one column from the table.