There are a lot of audio clips you have to listen to, with different accents. Like Vlad mentioned, the questions don't always relate to facts, but sometimes to feelings/intentions. Overall, I didn't find it too difficult though. I took the test at 4 in the morning, when I was up with a tooth ache, waiting for my pain medication to kick in, and was able to get a good score. :)

This is a link to the test website https://www.oxfordenglishtesting.com/defaultmr.aspx?id=3048

It left an odd impression on me. The first part (Use of English, which was actually mostly about vocabulary) seemed extra easy. The second part (Listening) was weird. Even though the speakers were easy to understand, only a handful of the questions bore on the facts presented in the recordings, most of them bore on feelings, intentions, thoughts and other things not directly mentioned.

puedes indicarme porfavor como mejorar el rendimiento en la prueba

So there's no writing or gapped reading? It's not like a proper CPE, is it?