Complex sentence: The main goals of such a promotion are advocating handwashing with soap to influence policy and funding decisions, rising awareness about the benefits of handwashing with soap, implementing sustainable handwashing behavior change with the ultimate goal of reducing diseases.
Split into simpler sentences: The main goals of such a promotion are advocating handwashing with soap. This should influence policy and funding decisions, raise awareness about the benefits of handwashing with soap and lead to sustainable handwashing behavior change with the ultimate goal of reducing diseases.