Comparing important metrics for diffrent time period plays a major role in understanding seasonality, product improvements, marketing campaign impact, and many more aspects of business.
Google analytics makes it super easy to compare metrics for diffrent dates with date comparison feature as shown in screenshot.
But this still gives you a birds eye view and if you want to drill down at each dimension value level, e.g. which are landing pages which have improved in period X compared to period Y or which campaigns have had more conversion rate during compared date ranges, etc. Google Analytics makes it really easy for you to sort data by diffrence during 2 periods.
Starting career with paid search, Nikhil has built and managed award winning digital campaigns, has been Google Adwords Top Contributor, Planned and implemented several complex and large scale web and mobile analytics implementations. Currently working for Myntra as Manager Analytics Nikhil is also conducts trainings on Web Analytics, Mobile Analytics and Digital Marketing.