The “Baseline” version of your image is automatically created by Image+. This is your original image, without any benefits added. It will be shown to approx. 20% of viewers – at no cost – to measure baseline engagement, compared to your other images.
Accounts with a paid plan can adjust this setting between 0% and 100%.
Set the Baseline higher if you are experimenting with new images and want to compare the results from a small sample of your audience before you roll out the new images to your wider audience.
Set the Baseline lower when you are confident your Image+ content is performing well. This will mean that only your images with benefits will be shown to viewers, which will maximize their impact on engagement, however you will not get any baseline comparison metrics.