In Sales/old Marketing, there was a campaign where we could capture additional details like description, category, or add any custom fields.

Now with journey, such things are not available.

Idea

Option 1: At Journey Level

Provide additional fields to capture further details and add custom form section (same as segment) to add more fields for any further details need to be captured as per business requirement.

Option 2: Parent of Journey

When campaigns are running, business have multiple journeys created, as part of that sometimes.

So, Create a parent entity (like campaign), to handle and capture these additional details and on journey, we can associate the same with lookup field.