You can sort your clients into named groups, for example by industry, so your client list is easier to manage and view. You set this up under Client Actions then Client Grouping.
Only the account owner and administrators see Client Grouping. Employees do not see it.
Each client can be in only one group, so the list of clients to pick from shows only clients that are not in a group yet.
The client list in the side bar shows each group name with its clients listed under it. Click the arrow next to a group name to collapse or expand that group. Clients that are not in any group are listed after the groups.
On the Client Grouping tab, click the group name. In the Update Group window you can rename the group, change which clients are in it, or delete it.