Bronze silver gold data layers are based on the concept of enhancing data quality and usefulness. The bronze level is usually used to store source data without any modifications, the silver level is used to clean and standardise the data, and the gold level is used to prepare the data for reporting or business purposes. This way, teams have more defined roles throughout the process and it's easier to keep track of the data. It can also eliminate levels of confusion if numerous applications make use of the very same data sets. How it is implemented will depend on the nature of the tools, governance needs and reporting needs of the organisation.