Promotional material refers to content designed primarily to highlight, advertise, or endorse a product, service, or concept, often with the intention of influencing perception or encouraging adoption. Unlike serious academic literature, promotional material prioritizes appeal and persuasion over scientific rigor or critical analysis.

In the context of medical research or neurosurgery, promotional material may include:

• Descriptive articles showcasing new technologies without supporting clinical data
• Opinion pieces that exaggerate potential benefits while omitting limitations
• Industry-sponsored content lacking transparency about conflicts of interest

Although such materials can raise awareness about innovations like 3D printing or virtual reality, they must be distinguished from evidence-based publications to avoid misleading conclusions about efficacy or patient safety.