Azure Data Lake is a cloud solution that includes all the capabilities required to make it easy for developers, data scientists, and analysts to store data of any size, shape, and speed, and do all types of processing and analytics across platforms and languages.
It removes the complexities of ingesting and storing all of your data while making it faster to get up and running with batch, streaming and interactive analytics.
Azure Data Lake works with existing IT investments for identity, management, and security for simplified data management and governance. It also integrates seamlessly with operational stores and data warehouses so you can extend current data applications.
For more information refer to https://azure.microsoft.com/en-in/solutions/data-lake/