Ok, that's hard to describe, just to make my point, have a look at the image below!
So let's try and explain it in 2 sentences max.
You can now define who can view or edit specific fields under the client, contact, project, and quote item modules. Meaning, if you want certain employees to see all financial information but not be able to edit the price, you can do it.
If your CRM integration shouldn't allow users to edit the name of a client, you can do that as well. And you can be far more specific about the fields you want them to see and edit.
And in the end, that's 4 sentences of me trying to explain, oh well.
Here's an article that can enlighten you (or confuse you) further: https://support.kompassbms.com/article/285-field-permissions
