Google Analytics case study
Google analytics is a platform that shows you information about traffic on your website or app.

What is it?
Google analytics is a platform that shows you information about traffic on your website or app. You can see there where your users are coming from (source, like search engine, social media, direct link), what are they doing on your website (what is the most popular page, what is a bounce rate) or who are your customers (age, location and more). It is a powerful tool that allows you to make your website better. As many Google tools, it also have API. That allows you to create your own data visualization, prepare automatic behaviors of your app, or put data into your own statistic tools. Lets elaborate on that, what more than only data gathering can give you Google Analytics API: https://developers.google.com/analytics/Who is using it?
Google analytics is widely used by website administrators all over the World. It is a basic tool to measure traffic on your website, and the most important fact - it's free.What are the benefits?
You can get all the most important information about your website in one place. For example, you can get information about how many users are on your website in a real time:

And much more. There are much better articles about Analytics itself, check them if you are interested: - By Google how to start - https://support.google.com/analytics/answer/1008015 - News, also by Google - https://analytics.googleblog.com/ - Or some awesome stuff by Neil Patel who talks a lot about Analytics and much more: https://www.youtube.com/watch?v=vqn7RPSPESM
I want to focus more on API side of this technology and show you what else than just reading data you can do.