It is an ETL tool currently acquired by SAP used for integration with all types of disparate systems, extracting data from them, transforming them into meaningful information and loading them into all types of systems.
It is tightly integrated with SAP systems and hence really a good tool to migrate data from legacy systems to SAP systems with ease and less development efforts with effective debugging and monitoring capabilities.
BODS Business Objects Data Services is a GUI workspace that allows to create jobs that extracts data from heterogeneous sources, transforms that data using built-in transforms and functions to meet business requirements and then loads the data into a single datastore or data warehouse for further analysis.
SAP Business Objects Data Services can be used for both real-time and batch jobs.