SFMC Tips #206 : Summary of Data Retention Policy for ... - Medium

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Every place a page here uses this source, in the order the words come in it.

1. However, for small and mid-sized organizations, there may be no need to be overly strict. In many such environments, all retention policies have been turned off without any major issues. “My conclusion is: create an operation model that fits your organization.” That’s all for now.

   In Operating model selection criteria

2. Once configured, it behaves as follows: “Automatically deletes records that have exceeded a specified period (all or partial)” Automatically deletes the Data Extension itself, including its records, when it reaches the defined retention period

   In Prospect data deletion workflows