Hello @Gamarawaji ,

The above statement is to call a script include in workflow or BR or reference qualifier.

For the statment [new KBWorkflow().startWorkflow(current, "workflow");]

KBWorkflow - script include name
startWorkflow - Function in the SI
current, "workflow"  - are the parameters.

The full statement will return the results to Restart Knowledge workflow using script in servicenow

Mark it helpful or correct, If Applicable

Cheers..!
Happy Learning:)
Tushar