Tables are only for tabular data. Given how they can often force users to scroll horizontally on webpages across video screen sizes, more complex tables should be in spreadsheet documents where they can be more easily navigated or reorganized into simple tables.

Where word processor functionality is possible (e.g., rich text or WYSIWYG editor), you should use lists (ordered/numeric or unordered/bulleted) for simple lists of ideas and tables for tabular data.