Cut sheets are also called product data. Estimators use them to check a product against the spec. Contractors send them to the architect as submittals after award.
Example: a lighting supplier gathers a cut sheet for each type on the fixture schedule. The supplier marks the exact catalog number and options on each one.
Compare the cut sheet to the spec before you price. Check the model, size, finish, ratings and listed options. If the product misses a requirement, price the right option or file a substitution request before the deadline.