Fulfillment
The actual execution of SEO work behind a reseller's brand.
Fulfillment is the hands-on delivery of the campaign: the audits, on-page changes, content, links, citations, and reporting. In a reseller model the provider owns fulfillment while the reseller owns the client. The reliability and quality of fulfillment is what a reseller is really buying, since their reputation rides on work they never see being done.