Custom meta description

Can I include product name in meta description? If yes, how can I do that?

Not automatically from the standard cart.

You will need to modify the code to include the product name along with the default info (usually full_description) when the meta-description field for a specific product is empty.

Best way is to set the meta-description to what you want rather than relying on automation to fill in empty pieces.

Ok but where is the code or function?