Process serving is a job that works independently, independent of the courts, to send legal documents and court materials by an unprejudiced third party. Typical use is to deliver documents, materials and also contracts to disinclined parties, or even to immediately subpoena defendants.
Processes are actually legal documents or court materials that might vary from complaints to summons. A process server can be used to give court confirmation that the document has been given to a individual involved with the case.