There are a lot of analytics tools out there. Google Analytics is arguably the most popular. Here are the 15 features that help make it powerful as well.
Daran Johnson has been a strategist/analyst/programmer for over twenty years and worked in digital marketing for over fifteen years. He co-founded Fujo, Inc./Fujo Analytics in 2005 and has provided digital marketing insights and strategies to dozens of companies over the years. He also writes a blog focused on digital marketing, analytics, and data science: daranjjohnson.com