Please Visit Update Client Details: User Guide to view the user guide. This user guide will walk you through the required steps on how to use the Update Client Details app.
P.S. Discover Update Client Details, the easy way to keep client information up to date in Salesforce. Find it on AppExchange - https://appexchange.salesforce.com/appxListingDetail?listingId=a0N3A00000EcsATUAZ