You can add a table to a slide by creating it right in PowerPoint. You can also copy and paste a table from Word or Excel. In this video tutorial from Microsoft, you will learn how to add and format a table within Microsoft PowerPoint.

1. Select the slide that you want to add a table to.

2. On the Insert tab, select Table.

3. In the Insert Table dialog box, do one of the following:

- Use the mouse to select the number of rows and columns that you want.
- Select Insert Table, and then enter a number in the Number of columns and Number of rows lists.

4. To add text to the table cells, click a cell, and then enter your text. After you enter your text, click outside the table.

Tips:

- To quickly insert a new row at the end of a table, click inside the last cell of the last row, and then press TAB.

- To add rows or columns, right-click a cell, click Insert on the mini toolbar, and choose where you’d like to insert the row or column.

- To delete rows or columns, right-click a cell, click Delete on the mini toolbar, and choose what you'd like to delete.

Learn more: https://support.microsoft.com/en-us/office/add-a-table-to-a-slide-34f106c9-5320-4b89-9129-806e64b258ac