Hello,

The benefit of reading newspaper on a daily basis to be well-acquainted with the latest happening, and when it comes to editorial part your thinking horizon will further be broaden by prolific writers, this will improve your vocabulary as well as writing  skills.

Now, why newspaper is important because when you read it regularly you are already grasping knowledge, so if you go through latest MCQs you can easily answer that because you'll remember it well as you've absorbed the information while what happens when you mug up everything at once,especially at the last stage of any exam, there's higher chances of forgetting and mixing up everything more so if your retaining power isn't that good.

The best thing to do in this is to have an integrated approach, what I mean is irrespective of the exam you're preparing go through the newspaper first, and solve MCQs after that, there are many sites which provides questions on a daily basis.

Newspaper reading is something that takes time to develop even if you're not preparing for exam like UPSC, where there's more number of hours to be devoted, reading an editorial itself can be challenging simply because of the kind of vocabulary used, but with patience and dedication anything is possible.