For example you can't decide which processor to buy, you can make a choice by looking at the Intel Core i7-8557U Cinebench r20 score multi and single core test and decide how powerful is this processor, is it a good CPU or a bad one to buy. Here you can find useful information from Cinebench r20 benchmark. A thorough analysis of all the technical characteristics, to make it easier to read, is made by the table. After looking at the data of joint test and video, you can already make an informed decision about do you need to buy Intel Core i7-8557U or not.
All the figures that you have looked at here do not mean that you should be guided entirely by them and trust a simple comparison of these figures. Be sure to watch the video tests and read the opinion of real owners of Intel Core i7-8557U before making a selection buy this processor or not.