What is the purpose of Google Analytics' multi-channel funnel report?

Google Analytics multi-channel funnel reports highlight the mediums that have played a role in conversion on your ad campaigns. The report is generated from conversion paths and interactions during the last 90 days. It also specifies the channels that drove traffic to your website. You can use this information to prioritize and further optimize your campaigns. Moreover, you can fully understand the dynamics of how your campaign truly works.