What are the benefits of kelp?

Could you please elaborate on the numerous advantages that kelp offers? I'm particularly interested in its nutritional value and how it might contribute to a healthy diet. Additionally, I'm wondering if kelp has any medicinal properties that could aid in the treatment or prevention of certain health conditions. Furthermore, could you discuss how kelp might be beneficial for the environment, perhaps in terms of its sustainability or ecological impact? I'm also curious about any other noteworthy benefits that kelp might possess. Thank you for your insights.