Add and Remove Permission Set License Assignments Faster

Save time by assigning multiple users to a permission set license together or by removing multiple users all at once. On each permission set license detail page, you can select multiple users to complete bulk assignment operations. Previously, you added or removed users individually from each user’s detail page.

Where: This change applies to Lightning Experience and Salesforce Classic in Professional, Enterprise, Performance, Unlimited, and Developer editions.

How: Before you remove the permission set license, you must remove the related assigned permissions from the user. Then, from Setup, in the Quick Find box, enter Company Information, and select Company Information. Scroll down to the permission set licenses related list, and click the name of the permission set license that you want to assign users to or remove users from. To see and remove current assignments, click View Users. To assign users, click Assign Users.

https://help.salesforce.com/s/articleView?id=release-notes.rn_general_psl_assignments.htm&release=234&type=5