Which reports indicate how website referrals, organic search, and ad campaigns assisted in conversions?

In Analytics, conversions and Ecommerce transactions are credited to the last campaign, search, or ad that referred the user when he or she converted. But what role did prior website referrals, searches, and ads play in that conversion? How much time passed between the user's initial interest and his or her purchase? The Multi-Channel Funnels reports answer these questions and others by showing how your marketing channels (i.e., sources of traffic to your website) work together to create sales and conversions. Tip: By default, only interactions within the last 30 days are included in conversion paths, but you can adjust this time period from 1-90 days.