We will install a simple schedule plugin as an example illustrating the plugin-installation process. The plugins are managed under Manage Jenkins | Manage Plugins: 

We can use the search function to look for the Schedule Build plugin under the available tab: 

From there, we will just click on Install without restart, and we will be able to check the installation progress on the following page: 

After the installation is completed, we will be able to see a new icon that allows us to schedule jobs more intuitively: 

It is one of the strengths of a popular open source project to have the ability to grow over time. For Jenkins, the plugins provide a way to customize the tool for different customer needs. In the coming section, we will look at how to integrate version control and the approval process into our workflow.