Do you mean Google My Tracks? I have it on my Nexus but haven't really used it much because i keep forgetting to turn it on :| Example
What Do you mean about Google Tracks it means like Google Analytics or some other Google Tools there are so many tools and Tracking tools now a days. and if you mean about tool for Google Tracking (Google Analytics) offering detailed visitor statistics. The tool can be used to track all the usual site activities: visits, page views, pages per visit, bounce rates and average time on site etc.