A table in Microsoft Word is a grid of cells arranged in rows and columns that can be used to organize any type of content, whether its text or numerical data. Tables can be created in Word by inserting a blank table or converting existing text to a table. Once a table is inserted, it can be customized using different styles and layouts. The Layout tab appears whenever a table is selected, and it provides options for modifying the table, such as adding or deleting rows and columns, merging or splitting cells, and changing the table style. Tables can also be formatted using Table Styles, which allow for formatting the entire table at once. To navigate between cells, use the Tab key or arrow keys on the keyboard.