Creating a Global Action to convert leads via the Salesforce mobile app allows sales reps to efficiently convert leads while on the go. This approach ensures that the functionality is easily accessible from the mobile interface, streamlining the lead conversion process for sales reps who are frequently traveling.
Reference:
Global Actions Overview
Setting Up Global Actions

This is the recommended solution for Cloud Kicks if they want to search and cross-reference records with the original source database after migrating 70 million records from a legacy database to the data warehouse that will be synced with Salesforce. Using a custom External ID field and mapping it to the source record ID value will allow Cloud Kicks to uniquely identify each record and match it with its corresponding record in the source database. A custom External ID field is a custom field that has the External ID attribute enabled, which means that it can be used as a unique identifier for data import or integration purposes.

A knowledge transfer is essential to ensure that the Cloud Kicks admin is fully equipped to manage the Sales Cloud implementation post-go-live. This process involves detailed discussions, documentation, and training sessions to cover any gaps in understanding and to ensure the admin can handle day-to-day operations and troubleshoot issues. It also fosters independence and confidence in managing the system.
Reference:
Knowledge Transfer Best Practices
Salesforce Training and Adoption