To launch the campaign, you should add the target list to the campaigns. This may contain the record of leads, customers and contacts. So on integrating the target list with the campaigns, the system will automatically send the campaign emails with the template we used at the time of creation.

Once the lead is created, it can be added to Target List. So now, after launching the campaign, the campaign emails can be sent to leads.

Once the opportunity is created, it can be added to Target List. So now, after launching the campaign, the campaign emails can be sent to opportunities.

Once the contact is created, it can be added to Target List. So now, after launching the campaign, the campaign emails can be sent to contacts.

Once the customers is created, it can be added to Target List. So now, after launching the campaign, the campaign emails can be sent to customers.