Hi Reshma,
The CA TDM Portal modernizes and simplifies tasks that you previously performed in the Datamaker and Test Data on Demand UIs. The CA TDM Portal enables test data engineers to import flat file definitions and generate flat file data. Additionally, the CA TDM Portal lets agile team members to submit requests for test data. You can read more about TDM Portal here: CA TDM Portal - CA Test Data Manager - 4.2 - CA Technologies Documentation
This page contains some demonstration and integration videos with the Portal: CA TDM Tutorial Videos - CA Test Data Manager - 4.2 - CA Technologies Documentation
If you would like to get started with Portal and you already have Datamaker installed and configured, you can start here with the Portal installation instructions: Install the CA TDM Portal - CA Test Data Manager - 4.2 - CA Technologies Documentation
Hopefully this will help you get started. If you have any further questions about implementing TDM Portal for your own use cases, please reach out to your CA Account Manager and they will be able to review this further with you.
Best regards,
Taylor