With Parallel Tracking, you can improve your user experience by sending them directly to the preview URL and hiding all the redirects in between. In the background you are still able to track the user as before.
Here is a good example from Google on how it works:
After creating your Offer go to Landing Pages
Select Parallel Tracking and add your tracking URL to the landing page
Important Note: If you do not input a Preview URL on the landing page, then the user will be redirected to a blank page.
Now when a user clicks on your campaign they will not see any redirects and will go directly to the preview URL
What the User sees:
User clicks your ad
User sees your preview URL
What happens in the background at the same time:
Swaarm click tracker loads
Tracking URL loads
Possible redirects may load if you have multiple tracking URL's
Without Parallel Tracking:
User clicks your ad
Swaarm click tracker loads
Tracking URL loads
Possible redirects may load if you have multiple tracking URL's
The user will see the URL's on their screen
User sees the preview URL
Note: By default, this is unchecked. You must check the box for each landing page you want to enable parallel tracking.
There are a few other requirements for parallel tracking that should be there, which are given below, please check these as well.
The offer tracking link should have the proper parameter and macros for the user agent and IP address. Except for Probabilistic attribution, idfa/gaid parameter and macros are also required.
The MMP should support the server-to-server side click and enable the specific offer that is going to start parallel tracking.
The network in between (before redirecting to the MMP) should support parallel tracking.
If you are using direct MMP links then the offer tracking link needs some more adjustments, for example. for Appsflyer:
&redirect=false needs to be added in the offer tracking link
&referrer=NetworkA_{id} should be added in the tracking link as well as the app store link for Android campaigns in order to work for the referrer or device ID attribution method
The tracking parameters will be depending on the MMP or Network offer link you are using, but these should be the Swaarm mandatory macros:
{user.ip}
{user.encoded_ua}
Swaarm optional macros depending on the Advertiser's attribution method:
{device.ids.idfa}
{device.ids.gaid}