When a lead is converted, a contact > Account > Opportunity are created and automatically connected to a campaign. But what if they are connected to several campaigns? Which one is best?

In Salesforce, the last campaign run on the lead gets the credit for winning the opportunity.

The campaigns with influenced opportunities report is the last of the 8 standard reports in the Campaign reports folder. It shows the opportunities that were influenced by our campaigns.

It is helpful to look at the campaigns that influenced the fewest amount of opportunities.