It can also give us a sense of the strength of the available evidence and the quality of the studies, thereby indicating how much confidence practitioners, service users, managers, policymakers, and the popular media should have in the results. A research synthesis can also help us find out how well a policy, programme, technique or intervention works in different subgroups of users and inform us about its potential to cause harm. Some research syntheses can shed light on the pros and cons of different ways of organising or delivering services or policies. A research synthesis that includes considerations of cost can help shape our judgments about whether a chosen policy or course of action provides good value for money.