Why do statistical data differ in clicks from the VK ad target and clicks from Yandex.Metrica?

Question

In contact with

Gave targeted advertising in VK. Ran for three days. The result of such
73 clicks on VK advertising

The statistics of the metrics on social networks shows 21 visits The

question is - where did 52 go? Why aren't there? And what can be done to prevent this?
Tech Specialists. VK support is silent about the reason 6th day

Answer 1

I think that it is not quite right to measure clicks from VK advertising with the report "sources - social networks". Make UTM tags for the advertised URLs - https://support.google.com/analytics/answer/103386...
And then you can accurately determine the traffic for your advertising campaign and, accordingly, make claims on VKontakte. In my experience with advertising, there were strong discrepancies (VK and external statistics) about 5 years ago, but for several VK campaigns last year everything was accurate.

Answer 2

the same problem. Li counter and metric show 60 visitors, VK target shows 100 visitors.