ARC summary, provided by GS SCORE is in great demand. Content matter is lucid and easy going.
Going through entire ARC is difficult and tedious task thus many students prefer to goo through the summarization. They are very helpful in overall understanding of government system, creating an analytical bend of problem faced by govt and their solution.
They are very helpful for GS PAPER 1,2,3,4. Lot of examples in ethics paper and polity part can be quoted from here. For Public Administration paper 2, lot of add ons can be found in these summarization.