@HimanshiArora

Queue-For-Processing method in an activity has below types of queue

Standard: 

In case of standard we only need to specify the activity name which runs the business logic.

Standard Queue processors will perform immediate execution.

Dedicated:

In case of any customizations or delayed processing of messages

Common Configurations for both standard and Dedicated:

Lock Using:

Primary page: If your primary page has pzInsKey, then you can use this option, so that pega take care of locking automatically on the step page

Key defined on property: if your step page contains key other than pzInsKey, then you can specify property that can be used as a key.

None: if you do not want to use locking then use this option.

Advanced Parameters:

writenow: use this option if you want to queue the message immediately even when the commit transaction fails,use this only when there is a need, because in case of success it will be queued automatically.

Queue current snapshot of page: if we want to use the snapshot of the page( current page values) while queuing then we will go for it, if unchecked it will take the pzInskey to get the refreshed values.

Alternate access Group: if mentioned bank , will take the access group of the requestor, and if mentioned will consider the mentioned access group.

Thanks

Gayatri