This feature is available on all Goodshuffle Pro Plans.
When creating a new service (article), you may see a few options of suggested attributes. You can also create your own custom attributes (article).
Attributes on services can be used to quickly identify a certain labor type - for example, if you enter your team as services you can add a "Labor Type" attribute to quickly filter which staff you can add to a project.
Other examples include:
Character: Goofy / Donald / Mickey
Range: Alto / Tenor / etc
Music Style: Classic Rock / Grunge
Own Gear?: Y/N
Event Types? Wedding, Mitzvah, Communion, etc (to track which talent is comfortable at which type of event)
Costume Size (for entertainers added as services): S, M, L, XL
Tracking emcees who speak multiple languages: Spanish: Y/N, Hebrew Y/N
Property for contact information like cell phone