We're collecting the Matomo keyword and campaign and the banner impression counts (per-banner and overall) in the donation and membership data. Currently, there are two ways the data is stored:
* The code in `app/Bootstrap.php` takes the campaign and keyword the URL or a cookie, makes it available on every request and writes it into the `spenden_tracking` session cookie (to make it available on subsequent requests).
* The impression counts are taken form the URL and passed around as form fields
A better way to handle these parameters would be to store them ALL in the session.
This ticket is about the storage of tracking information inside the PHP code and framework, between requests. There are two related tickets that deal with the //persistence// of the information, associating the tracking information with a donation or membership: {T134327} and {T203679}