I respectfully disagree. This is a terrible resource, which frequently says things that are either mostly vacuous or just plain wrong.
For example, here's their page on the right to erasure:
https://ec.europa.eu/info/law/law-topic/data-protection/refo...
Its opening paragraph reads as if data subjects have an automatic right to have their data deleted unless one of the three exceptions applies. In fact, Article 17 of the GDPR itself grants that right only under a list of specific circumstances, and the exceptions are just that, which is an entirely different situation that will lead to the opposite decision on whether data must be erased in many normal situations. Even the list of exceptions shown isn't complete.
For another example, here's their page on demonstrating compliance:
https://ec.europa.eu/info/law/law-topic/data-protection/refo...
There is literally nothing on that page that would help any business I'm dealing with to demonstrate compliance, unless you count the references to the primary sources at the end. There are a couple of ideas about codes of conduct or certifications that contain no substantial details, and even the vague hints about other things you might have to do don't go into any detail about who does or doesn't, leaving the entire page almost entirely content-free unless you happen to be in an industry where the kind of scheme they mention exists.
This sort of "guidance" is everything that is wrong with how the GDPR is being handled. It is verbose, ambiguous, sometimes seriously misleading, and almost entirely non-actionable. I'm actually worse off than I was before I read it, because I know nothing useful now that I didn't know before, I would have been misled by several of the pages such as the one I mentioned above if I hadn't already known better, and that's still half an hour of my life wasted.