Create and format a table
Organize information or data with tables on your slides, use Table Styles to format the tables, and then change the layout.
Add a table
Select Insert > Table > Insert Table.
In the Insert Table dialog box, select how many columns and rows you want.
Select OK.
Add table styles
Select the table.
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Select Design and choose from the Table Styles. Hover to preview styles.
Select More to see more Table Styles.
Change table layout
Select the table.
Select Layout.
Choose from the different groups to make changes:
Rows & Columns
Merge
Cell Size
Alignment
Table Size
Source: Microsoft