This article explains why Google URL shortener is not available in the Source Tracker and which options are.
SAP SuccessFactors Recruiting Marketing
Google shut down its URL shortening service on March 30, 2019 as mentioned on this blog.
As a result we have removed this option from our Product
The only available URL shortener integrated at present is Bitly.
Any additions to this option would constitute an anhancement request. To suggest an additional URL shortener, please submit an enhancement request as per KBA 2090228 - How to Submit Enhancement Requests for SAP SuccessFactors Products
Google URL shortener, Source tracker, Bitly , KBA , LOD-SF-RMK-MC , Job Marketing (Solique, eQuest, Broadbean) , How To