This Feature Console page enables you to update the Baseline fields on projects that were created before these fields were introduced on the Project object. It works by updating the Baseline fields in bulk by running a batch job.
Previously, to populate the Baseline field with details from the current baseline version on projects with an existing baseline version, you had to select it from the Baseline field manually on each project.
For information on how to perform this feature step, see Enabling and Disabling Features.