Step 10 of the PMSD guideline emphasizes the importance of effective communication for market actors to share knowledge and promote system-wide changes, ultimately aiming to empower marginalized communities. It differentiates between systemic communication, driven by market actors, and strategic communication by facilitators to engage stakeholders and donors. The guideline provides recommendations on how to create conducive environments for knowledge flow and emphasizes the interconnectedness of the PMSD roadmap steps to enhance communication efficacy.