A Sheet is a framework used to store data. For example, creating a "Sales Order" sheet means designing which fields to include, setting the types for each field, and defining any relationships with other sheets. It does not refer to the act of filling out a sales order record.
Each Sheet can have multiple records, which are displayed through the Listing Page and Form Page. All sheets in a database can be accessed through the tabs in the interface.
On the database homepage, you’ll see an overview of all sheets:
For a step-by-step guide on creating a sheet, please refer to this article.