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