Hey @Nisha,
Ansible Tower is Ansible at a more enterprise level. It is a web-based solution for managing your organization with a very easy user interface that provides a dashboard with all of the state summaries of all the hosts, allows quick deployments, and monitors all configurations.
The tower allows you to share the SSH credentials without exposing them, logs all the jobs, manage inventories graphically and syncs them with a wide variety of cloud providers.
Have a look this blog for a more detailed explanation.