Jira supports importing data directly from many popular issue-tracking systems and common data formats. All the importers have a wizard-driven interface, guiding you through a series of steps. These steps are mostly identical, but have a few differences. Generally speaking, there are four steps when importing data into Jira, as follows:

1. Select your source data. For example, if you are importing from CSV, it will select a CSV file. If you are importing from Bugzilla, it will provide Bugzilla database details.
2. Select a destination project where the imported issues will go. This can be an existing project or a new project created on the fly.
3. Map fields from the other source to Jira fields.
4. Map field values from the other source to Jira field values. This is usually required for select-based fields, such as the priority field, or select list custom fields.