How to create a user tracking system?

Question

Analytics

It is necessary to write a system for tracking users, who goes where, where and how many times the link was clicked, which pages are more loaded, etc. perhaps there are ready-made solutions or systems where I simply inserted a global variable and the statistics started ... I beg you for more links and information on the case.
Perhaps there is a system for collecting information about users, so that there would be graphs, etc.
I will keep adding different modules to my statistics system, for clarity, more is better.
Thanks to those who wrote and spent a little time.

Answer 1

Google analytics, Yandex.metrics.

Answer 2

Why reinvent the wheel, everything you need is in Yandex.metrica, including the webvisor

Answer 3

I am confused by the requirement to remove all separating characters - after all, then it is impossible to distinguish 56 * 7 from 5 * 67 ... For Javascript , I would do something like this (you can remove the comma in the second replacement):
jsfiddle.net/petroveg/0o7a3yr4

Answer 4

I would suggest the following "knee" option, since Excel is specified.
Import your text like
1_Side_1984*378*2pcs_Groove16
...
as csv with separators _
then take the column with dimensions, select and copy.
paste it into a newly created text document.
And removing * and "pcs" is a simple matter