When we send a Marketing Cloud email to all campaign-members of a campaign in salesforce, how we can track that how many campaign member opened that email?
You need to include the below open tracking snippet in your email:
<custom name="opencounter" type="tracking" />
If this has been done, you can check the tracking results in Email Studio like this:
- Click the Tracking tab
- Select the folder where the email you want to view is stored
- Click the name of the email in the tracking workspace.
To view individual subscribers (including the subscriber key, email address and open time) you can click on the number of unique opens.
For an automated way to use the open information you can use an SQL query on the _Click Data View using a SQL query activity in Automation Studio (see "Data View: Open" documentation article)