What is data islands?

Data islands refer to isolated or disconnected pieces of data that are not integrated with the rest of an organization's data. These data sets may be created by different departments or systems, or may exist in different file formats or databases. As a result, these islands of data may not be easily accessible or searchable, leading to problems with data quality, consistency, and analysis. Data islands can also create challenges for organizations trying to unify their data and create a single source of truth. To overcome these issues, organizations may need to implement data integration strategies that allow for increased control, standardization, and sharing of data across different systems and departments.