Once you have integrated Jira and Bamboo, you will be able to run and release build plans directly from Jira. All you have to do is select the version to release and select the new Build and Release option, as shown in the following screenshot:

From the release dialog shown in the following screenshot, you can select which build plan to use and run the build by clicking on the Release button. If the build is successful, Jira will automatically mark the version as released once the build is completed:

Another feature that you get from integration is that you will be able to see a list of builds that are related to a given Jira issue from the Development issue panel:

As you can see, all the build are now listed.