In the Salesforce Setup, in Custom Metadata Types, you'll find three Types for Plauti Assign. Below it is explained in short what these settings are for. Please change these settings in Plauti Assign, not here.

Assign Queue Processor Batch Size

API name: leadassist__SRR_Queue_Processor_Batch_Size__mtd

Find the current batch size for attempting to assign Queued records. The batch size is the number of queued records that will be processed within a single transaction. 
Configure this setting via the Plauti Assign app: Assign Setup > Settings > Batch Size.
Read more in Set Batch Size of 'Process Queued Records' Job.

Plauti Assign Object

API name: leadassist__SRR_Object__mdt

See which of the default Objects supported by Plauti Assign are currently enabled for having records assigned. 
Configure the Objects via the Plauti Assign app: Assign Setup > Object Configuration.
Read more in Enable or disable Assign for default Objects.

Plauti Assign Optional Parameters

API name: leadassist__SRR_Options__mdt

The Optional Parameters contain some additional settings to improve your Plauti Assign setup. View the current values here; configure these setting via the Plauti Assign app > Assign Setup > Settings.

Advanced Telemetry

Also known as ‘Plauti Analytics’. This setting is used to help Plauti improve its products & services by sharing anonymized analytics. The analytics are fully anonymized and cannot be traced back to you. No user or record data is retrieved.
Configure this setting via the Plauti Assign app: Assign Setup > Settings > Advanced Telemetry

Apex Plugin Class Name

Used for operational mode ‘Plugin’. For that operational mode you can create an Apex Class that contains your own matching and assigning logic. The name of that class is listed here.
Configure this setting via the Plauti Assign app: Assign Setup > Settings > Plugin Class name
Read more in Operational Mode: Plugin.

API Name for Desktop Notification 

To send Salesforce in-app and push notifications for desktop, you need to create a custom notification. The API name of that custom notification is listed here. 
Configure this setting via the Plauti Assign app: Assign Setup > Settings > Desktop Notification API Name
Read more in Send notifications on assignment.

API Name for Mobile Notification 

To send Salesforce in-app and push notifications for mobile, you need to create a custom notification. The API name of that custom notification is listed here. 
Configure this setting via the Plauti Assign app: Assign Setup > Settings > Mobile Notification API Name
Read more in Send notifications on assignment.

Error Email

The email address where error notifications should be sent to.
Configure this setting via the Plauti Assign app: Assign Setup > Settings > Error Email Notification Address

Order By Date for processing QUEUED (queuedRecordOrderByDate) is deprecated and should not be used anymore. Use ‘Queued Record Sort Order’ instead.

OrgWideEmailAddressID

You can set an organization-wide email address as the sender of email notifications sent from Plauti Assign. The Salesforce ID of such an email address is listed here. 
Configure this setting via the Plauti Assign app: Assign Setup > Settings > Org Wide Email Address ID
Read more in Use Org Wide Email Address For Email Notifications.

Queued Record Sort Order

Queued records are ordered for processing based on the CreatedDate. ASC stands for ‘Ascending order’, DESC for ‘Descending order’.
Configure this setting via the Plauti Assign app: Assign Setup > Settings > Sort Order for Queued Records

Turn Off Async Processes

If you are getting close to your 24-hour Asynchronous Processes Limit, you can turn some processes off. If this setting's value states ‘TRUE’, they have been turned off. 
Configure this setting via the Plauti Assign app: Assign Setup > Settings > Turn Off Async Processes