What exactly is Trust Depth?

[thesourc3]

So I was looking around on my account and came across something called Trust Depth within trust settings. The default value is set at "2" and it states that the max is 4. Below the setting input is an array of usernames with trust scores next to them, however I can't seem to figure out what exactly this represents or what changes when you update the numeric value to anything other than 2. Upon updating the value to "4", I see more names below it but I'm still confused as to what this actually does. Can someone who understands what this setting does provide a bit more insight on this? I'm currently trying to sell a few items here on the forums so I want to make sure that I have any trust settings properly set on my account. I'd greatly appreciate it!

[actmyname]

^{2419329067823cab5b4e5ac5dd18a6abf1f57f45e753f5fc934292f3085a3717 | why did I pick this post?}

This belongs in Meta.

For the purposes of explanation, trusting someone simply means that you carry their feedback in the "trusted" section.

Depth is the degree of which you recursively trust those in your trust list and those that are in the trust lists of people that you trust.

For example:
Depth 0 means that you only trust people who you add to your trust list.
Depth 1 means that you trust people who are in your trust lists, and in the trust lists of people you added to your trust list.
Depth 2 means that now additionally, the people in the depth 1 lists are trusted by you.
Depth n means that you trust the people in the depth n-1 lists.

An illustrative example:

This symbol: -> means adding someone to the trust list.

You -> A
A -> B
A -> C
B -> D
B -> E

Depth 0:

A is trusted.

Depth 1:

A is trusted, B and C are trusted.

Depth 2:

A is trusted, B and C are trusted, D and E are trusted.If you're familiar with CS terminology, think of it as a tree with nodes, where parents add children to their trust list.