It includes a manuscript assessment and it includes specific comments in the margin of the manuscript from your assessing editor. Comments usually identify locations that illustrate a point made in the assessment report, for example an accidental switch in point of view or a telling, not showing summarisation. Comments also offer suggestions for development, for example prompts to make a scene more immersive by adding background detail or atmosphere.
The service is for those writers who find it useful to have specific examples highlighted on the manuscript.