By default all campaigns have tracking enabled. Tracking allows you to monitor the opens and clicks on a campaign, meaning you can analyse performance and engagement for your users.
"We use tracking technologies such as tracking pixels in some of our emails. These are set on our behalf by EmailOctopus (our email service provider) and help us to understand how you interact with those emails, and we use that information to improve how we use email to promote our products and services."
If you are looking to reduce the amount of tracking put in place on users, we support the disabling of tracking on a per campaign basis. If you're not actively using your metrics, we would go as far to recommend this approach.
To disable tracking, simply choose the below options when creating a campaign.