Lead score is an indication of how valuable you deem the lead to be either to you or your customer.
Lead score can be set either manually or by lead score rules based on one or more fields in a campaign workflow.
Lead score can also be used in the selection of the contracts who want the lead, by setting the minimum lead score the contract accepts.
The lead score has a range from 1 to 1337.
Furthermore, lead score rules in a campaign workflow can also be used to automatically disapprove an inbound lead.
Offcourse an inbound lead can always be re-approved.