Which information is stored in iCloud

read here: iCloud: iCloud storage and backup overview

Yes.

At the end of the article:

Your iOS device backup only includes data and settings stored on your device. It doesn’t include data already stored in iCloud. That includes contacts, calendars, bookmarks, mail messages, notes, shared photo albums, iCloud Photo Library, My Photo Stream, and documents you store in iCloud Drive. If your iOS device isn’t set up for iCloud Drive, but is set up for iCloud Documents & Data, your documents stored in iCloud are backed up.

iAmRenzo wrote:

I read that. But it doesn't even mention text replacements or iCloud Keychain, so my believe is that is isn't a complete list of all the things... and it's a public support page. I do reseach for I post here 🙂

It doesn’t include data already stored in iCloud.

eg. Keychain.

Content purchased from Apple is already in iCloud and is not part of a iCloud backup. If you want you can backup iTunes Library locally.

Did you read my reply?

That includes contacts, calendars, bookmarks, mail messages, notes, shared photo albums, iCloud Photo Library, My Photo Stream, and documents you store in iCloud Drive. If your iOS device isn’t set up for iCloud Drive, but is set up for iCloud Documents & Data, your documents stored in iCloud are backed up.

Anything else you like to know, please be specific?

iAmRenzo wrote:

Yes, I sure did. But you don't understand my question or you're just scoring community points by answering with Apple supportpages, which I can find myself easliy.

...

I don't get points by giving you Apple support pages.

This is how it works, read below:

Choose the answer that solved your question (giving points)

If you’re the original poster who started a discussion, you can choose one response as the best answer. A copy of the
answer will display below your question.

To choose the answer that solved your question on a discussion you started:

No.