In Dataverse, tables are of two types: standard and custom
Standard Tables are predefined and come out-of-the-box. They cover common business needs such as Accounts, Contacts, and Users. You can customize them slightly, but their core structure is fixed. They don’t have any prefix and used in the common scenarios.
Custom Tables are user-defined. They give you flexibility to add columns, relationships, and business logic for specific needs. You can also choose the ownership model (User/Team or Organization), and they usually carry a prefix (e.g., new_project) to distinguish them.
If you click on Custom Tab section, it will give you custom tables created in the dataverse as shown below. Whereas All tab will display all types of tables.
