Workflow Field Updates
Workflow Rules (along with Process Builders) are now on a deprecation / End-of-Life plan. Existing Workflow Rules will continue to operate for the foreseeable future, but in the near future (Winter 23) Salesforce will begin to prevent creating new Workflow Rules. Establish a plan to migrate to Flows, and create any new automation using Flow Builder.
FU, followed by a number corresponding to the number of field updates on the triggering Object.
A Workflow Field Update SHOULD contain the Object name, or an abbreviation thereof, in the Field Update Name.1Examples
1 While Field Updates are segregated by Object when viewed through an IDE or through code, the UI offers no such ease of use. If this is not done, a consultant WOULD PROBABLY create list views for field updates per Object.