The Screener allows adding your own custom rules based on Regular Expressions.
The feature is useful in case if you want to mark as spam a specific content.

Go to Settings → Custom Rules.

On the screenshot above it can be seen that there is 1 Custom Rule created.
In a short overview the Screener shows:

• Name of the Rule
• Regular Expression Pattern
• Score
• Enabled\Disabled
• Created at
• Updated at

To add a Custom Rule, please use the +Add button.

As soon as pressed, the "New custom Rule Page" appears.