# Groups relationships

SEO NEO introduces an new way of displaying diagrams. The new diagram form is more compact and its more versatile if you understand they way it works.

A group (link group) can be connected with another groups that are located below or above them. Groups below of them are called **children** and groups above them are called **parents**.

{% hint style="info" %}
A diagram a group can have **multiple children** but also **multiple parents**.
{% endhint %}

A group with multiple children is a very straightforward idea but a group with multiple parents may be confusing at first. Below we will explain how this works.

### Understanding multiple parents

A group with multiple parents is like being multiple groups. This means that if you have a group*A* connected on two parents, the result is like having two groups inside group\_A.

On the example below, on the left we see how diagram looks like and on the right side we see how diagram is really like under the hood.

On the example, **group\_4** seems like a single group, but because it has two parents, in reality its two groups (**group\_4a** *and* **group\_4b**). These two groups are **completely different** groups.

<figure><img src="https://2718133043-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F2UzeMjUGHvOZRX1jMiVc%2Fuploads%2FhMdzIeO5sRW4MyXwsMyk%2Fdiaram_multiple_parents.jpg?alt=media&#x26;token=438add02-e269-42ce-b4ca-08c8640716a0" alt=""><figcaption><p>Left side: how diagram looks. Right side: how diagram is under the hood.</p></figcaption></figure>

{% hint style="info" %}
As a rule of thumb, if a group has **N** number of parents, then this group has **N** instances under the hood.
{% endhint %}

This may seem more complex to understand as a concept but makes a diagram much more compact (you need less groups to describe a much bigger diagram).