Group Block
Use a Group block to create logical groupings within an flow to make complex flows easier to read. While Group blocks do not affect the flow, you can collapse and add comments to Group blocks to provide an overview for other users.
Block Properties - General Tab
From the General tab, you can edit the Block Label and add a description.
Use the Group block to add a description within the flow and to collapse and expand sections of the flow. In the following example, the Group blocks help describe the processing that occurs within each Group. These descriptions can help another user understand how this flow works. In addition, you can nest Group blocks:
Use the Label and Description fields to describe this Group.