The document discusses how project scope creep can negatively impact projects if not properly managed. It begins by defining scope creep as adding new features or changing requirements, which can disrupt planning and require additional resources. Left unchecked, scope creep can cause delays, missed milestones, cost overruns, and lower quality. The document then provides tips for preventing and containing scope creep, such as thoroughly defining initial scope, having a robust change control process, regularly communicating with stakeholders, and referring back to the original scope document.