Push New Campaign button and then create Free Shipping Bar campaign.
Create memorable campaign name that you can distinguish later
Now you see random Shipping bar set by default. So let's get started:
Set the Goal - you can go without it to be honest. It depends of your desire to make it more results-oriented from collecting emails to just viewing of content. In order to learn more about how to set goals for your campaigns, I would like to recommend you to read a separate guide on how to set goals and why do you need that;
Design your campaign add text message, change colours, patterns. Make it look fancy;
In Behaviour section you may set where and when this campaign should appear. By the way in case you have any bugs we have preventive measures to take
Schedule campaign in Settings section;
Choose type of device on which you're planning to run your campaigns, put your page's URL and include or exclude locations to show the campaign.
And some tips attached.