In really broad terms, if you think of your data travelling down a path – and then getting blocked by tracking preventions, RescueMetrics just provides a new route for it to take.
The script which is added to your domain allows RescueMetrics to register when a user session has been disrupted (by tracking preventions) – and which platform this occurred in. This data is then fed directly into your existing analytics – just via a separate path.
It’s worth noting – all tracking preventions fit into one of two boxes, so RescueMetrics treats these two types differently:
The first type are preventions which stop your tags/pixels from loading (and if they do load, it stops the data from being sent back to your platforms). RescueMetrics registers those disruptions and reroutes them through an alternative route that avoids the same pitfalls.
The second type are preventions which purge cookies after a certain amount of time or (or stop them from being registered at all). This stops users from being tracked across multiple sessions. RescueMetrics has a mechanism to extend the shelf-life of those cookies by backing them up and then restoring them when people come back to the site.