you need to add some sentences about how Amazon used OKRs in the company and make what results or changes by using OKRs to their performance measuring system. As you mentioned in the last essay ” Some of the key areas which rely on OKR systems in Amazon is the level of sales, the results of a new system in improving performances and the overall revenue growth against certain changes. ” Describe what kinds of changes after they using OKRs and how they used the OKRs in then Amazon.