Jira is a project management tool released in 2002 by Atlassian that is widely used for managing products, projects, processes, and services. It was originally derived from the word "Godzilla" and was initially only available on-premise, but now has a cloud-based version called Jira Cloud. Jira provides configurable settings and plugins to customize development or project management workflows, and can integrate with other Atlassian tools to automate processes from start to finish.