I was wondering if anyone can give me a blurb of the difference between trusted vs. untrusted when importing a leads list into programs.
As a general rule of thumb, asking in the Discussions section will get you a reply much faster. That being said, you'll be able to find the answer here: Block Field Updates During List Import from Untrusted Sources - Marketo Docs - Product Docs
It's to control how much data a list upload is able to update for existing leads.
Retrieving data ...