The update comes with a lot of new configuration settings, which are mentioned in the update history page.
It is recommended to enable or check the following new settings:
•Protocoling Microsoft Teams Web Meetings in Salesforce
•Office 365 Authentication - Improving security by requiring authentication
Desaster Recovery Plan
Read the Desaster Recovery plan, which allows you to solve a major outage yourself.
If you did not update from version 7.6, have a look at the recommended update settings of the older versions
Customers with Premium Support can open a ticket and request a free installation and explanation of the update. A full Power Dialer or SMS setup is available for an additional fee.