latest product menu

about the latest products menu,
if i not upload new product, how long it will stay there.

because i found this module in my website not appear , i not sure since when .
and i check at backend, the menu is publish.

Do you mean a menu or a module ?

The latest products will be displayed all the time. If you set your module/menu to be ordered by product_created and with the direction descending and display 5 products, it will always display the last five products created.