A project is a collection of one or map versions that have the same source and target code systems (but not necessarily the same code system versions).
For example a single project could contain 2 maps: ACME codes to SNOMED map v1 (source: ACME code system v1.0, target: SNOMED CT International version 20210131) and ACME codes to SNOMED map v2 (source: ACME code system v1.0, target SNOMED CT International version 202107031).
When creating a new map, a project is automatically created. When a new version of an existing map is created within the tool, it will be placed into the same project as the original version that has been copied.