I think many people were leery of using iCloud in its early days. It was a little buggy and did not have many features. Currently, more and more Mac people are using iCloud. It has become fairly stable and has many nice features. One of those helpful features is iCloud Photos Optimization. All Apple devices have limited storage capacity these days which makes iCloud Photos Optimization a great idea. This article explains how iCloud Photos Optimization works and why it is necessary.