Notion's database feature is one of its most powerful and flexible features, allowing users to create custom tables and organize information in a variety of ways. Here is an overview of how to use the database feature to create custom tables and organize information:

1. Create a new database: To create a new database, you can either click on the "+" button on the sidebar and select "Database," or you can use a pre-built template from the template library.
2. Define the properties of the database: Once you have created a new database, you will need to define the properties of the database. Properties are the columns in the database and can include things like text, numbers, dates, and more. For example, in a task management database, you might have properties for the task name, due date, and status.
3. Add rows to the database: After you have defined the properties of the database, you can begin adding rows (or records) to the database. Each row represents a single item in the database, and you can add as many rows as needed.
4. Customize the view of the database: Notion allows you to customize the way the database is displayed. You can change the layout of the database to see the information in different ways, such as in a table, calendar, or board view. You can also add new columns and properties as you need, move and sort the columns, change the font, add color, and change the way the information is presented.
5. Use filters and sorts: Notion allows you to filter and sort your information in the database so you can find the information you need quickly and easily. This can be particularly useful for large databases with many rows.
6. Use relationships: Notion also allows you to create relationships between databases, so you can easily link information from one database to another. This can be useful when creating more complex systems, like linking an employee database with a task management database.
7. Sharing and collaborating: You can share your databases with others and collaborate with them. This can be useful when working on a team project, or when sharing information with clients or customers.

By using the database feature in Notion, you can create custom tables and organize information in a way that works best for you. With the flexibility to customize and the ability to link different databases, you can create a highly customized and efficient system for organizing and finding the information you need.