How to determine the intersection of audiences on your sites?

Question

PHP

There is a network of sites.
It is necessary to determine the degree of intersection of audiences.
Preferably, in general, their paths along the grid (site A, site B) and the date of entry.
Are there any such services or ready-made scripts?
If not, then write the script yourself, set cookies for everyone and then compare them?

Answer 1

LiveInternet - there is an audience comparison tool. Yandex.Metrica
has a site path map. But in your case, apparently, you will have to enter all sites as one, or track them separately.

Answer 2

To build such reports, you need to set up cross-domain tracking if all sites are on separate hosts. Then you will be able to track the movement of the audience between sites in GA reports. Learn more about cross-domain tracking .