The outcome of this experiment was diverse in terms of consent choices. More visitors accepted cookies in both binary conditions, where they had the option to decline
cookies, rather than in the non-nudging confirmation condition, where they could only accept cookies or not interact with the notice. In comparison to Experiment 1, the total percentage of people who interacted with the banner increased (from 13% to 55%), most notably on mobile devices. The highest interaction rate (55 %) occurred for the binary consent notice placed on mobile devices.
Now that you know which cookie consent notices perform better than others, you are able to decide on your own what the best choice would be for your website. But keep in mind that if you use Visitor Analytics to track your website, no cookie banner is needed. Just make sure that you go to your account settings and choose IP anonymization and consentless tracking options.
Keep in mind that other third-party tools or plugins used on your website might still require you to have a consent banner in place, but if Visitor Analytics is the only third-party app on your site, you can rest assured that no annoying cookie banner is needed.
Use consent banners if you need them, but be aware that you might end up with less than 5% of the actual data when you do everything legally.
You can read more about how the cookieless tracking process works here.
Source: "(Un)informed Consent: Studying GDPR Consent Notices in the Field".The authors of the paper are Christine Utz, Florian Schaub, Martin Degeling, Sascha Fahl, and Thorsten Holz.