Google recommends using a cookie banner from a Certified CMP Partner since that will make it easier to follow Google’s requirements.
It also ensures the cookie banner is correctly integrated with Google Consent Mode v2. As a marketer, the latter is of utmost importance if you intend to get the most out of Google Ads and Analytics while staying compliant in accordance with the EU user consent policy.
If you want to ensure your cookie banner is set up correctly,
you can test it here for free.