[konha]

Because nothing even comes close to the power GA gives you analyzing medium to big sites. It‘s free (up to a very high limit in tracked events) and easy to integrate. Every digital marketer on the planet is already familiar with it and will be productive instantly. Integrations with other tools is unmatched.

Don‘t get me wrong: The open source alternatives are great and there are valid privacy concerns with sending all your customer‘s data to Google. But for moderately interesting analytical requirements there‘s just no comparison.