Porridge in the head of angular NGRX ??

Question

Angular

You need to put everything in your head on the shelves regarding ngrx. First, please explain in simple terms what ngrx/entity and ngrx/data are used for. I read the documentation and made some idea in my head about what it is and what it is for, but the idea is sluggish. Second: let's say that I have a task to make an application in which there will be a list of some books, there will be pagination by page, detailed information about the book, setting various filters for sorting books. With all this, I need to save the state of already read pages in pagination, so as not to make unnecessary requests to the server, save the state of filters, and so on. Do I need to use ngrx for this, is it an important need in this case and will it make it easier? Thank you.