Why are there several Analytics on the site?

Question

Google Analytics

I often see how on the site, in addition to one, for example, Google Analytics, Ya. Metrika also weighs, sometimes I meet more than 3 pieces. Why do they do it? Is it really worth connecting another one because of a couple of features?

Answer 1

Perhaps only GA can be considered acceptable analytics.
There are also solutions like Mixpanel, Kissmetrics, RJMetrics, etc., but I don't think you see them often.
The Metrica code is required to track goals in Yandex.Direct and remarketing.
For remarketing on mail.ru products, you need the top.mail.ru counter.
Simple counters are usually set either to get a powerful link from the rating or to show statistics to advertisers.

Answer 2

Sometimes customers like to prescribe in the TOR - we want GA, NM, LI right away, and a bunch of something else that they heard about somewhere.
Why? Because their colleagues on the site "have it."
Do I need 5 counters on the site? Debatable.

Answer 3

not worth it, but persuading management is a big problem

Answer 4

Many webmasters connect several analytics to compare queries from different PS.
But whether it is necessary to install it, then this is optional.

Answer 5

The answer is simple)
All search engines encrypt their search phrases.
To see at least something - you need to put a cloud of analytics ...
Here is such a "fun" future)

Answer 6

Yes, installing multiple counters is definitely worth it. None of them will provide you with 100% reliable data, they are determined by comparing the same indicators on different analytical platforms (popular counters do not work for people with disabled JS in the browser).
You also need to analyze your server logs, this is already reliable data, for example, Piwik.
Here is an example of installed counters/other modules on a large project:
And that's not much :).

Answer 7

The main reason for the example of Russian Railways: