Notes
The “View All” and “Modify All” permissions ignore sharing rules and settings, allowing administrators to grant access to records associated with a given object across the organization. “View All” and “Modify All” can be better alternatives to the “View All Data” and “Modify All Data” permissions.
What is the difference between View all and modify all in Salesforce?
View All Data will grant read access to all objects and records, provide ability to see all data in the organization.
Modify All Data will grant create, read, edit, and delete to all objects as well as full access to all records , provide ability to edit and delete all data in organization.