Lots of Automation. You may automate deploy, build, and everything you need. All with dashboards, centralized interface, and split by logical folders. All integrated in active directory or other authentication;
A variety of plugins to choose, as input and output;
In resume, you may automate the build of your software, and deliver in development, QA and production environments, all monitored and with logging/audit of who is running what job, and when was executed.
The time you need to learn to use, if you're trying to use it alone. If you learn from someone that already use it, it's really fast to learn.
If you already use a tool like this, maybe this tool is not for you. But, if you don't have any tool to automate stuff, give it a try, because you only need a server to start, as the software is opensource. It will already help you with lots of stuff. From simple Windows scripts, to more complex, like build and deploy to Kubernetes, in different environments, with aproval of different users, alerting in a slack or another tool, all this Jenkins will help you to solve. It may be manually started, event driven, or another way you choose to use it. The setup, as it is a orchestrator, is fast and requires to know the other servers more than Jenkins server, like credentials, paths, executables, source and destination and what you need to execute there. Have fun with Jenkins!