To group protocols, and easily navigate them back search for a specific word, you can add a tag or label to a protocol by clicking +. Note that you can only add tags to a protocol draft.
In the appeared menu you can easily select an existing label or create a new label in the input field and click Add.
The label is added to the protocol and also can be removed there. Removed labels that are not used on other protocols are automatically cleaned up in the system.