What does the "Use Raw Numbers" setting for email connectors do?

Recently, we ran into an issue with one of our email connector datasets where a "Currency" column was being formatted as a string which was causing issues down the line in other dataflows. We're not sure how the problem initially started, but we found that enabling the "Use Raw Numbers" setting seemed to fix it and prevents it from happening again.

I've been looking around for information on what this setting actually does (in Domo articles and in other community discussion posts), but have not been very successful. Can anyone give me an in-depth explanation of what happens when this setting is enabled vs. disabled? Thanks!