The save panel includes saving and publishing controls. It is usually located in the upper-right of the product editor screen.
Click the checkbox or the word Published to publish the product to your catalog. The product must be saved with the Published setting on before it will appear in your catalog. Products that are not published will be hidden and completely inaccessible from the storefront catalog.
Similar to the posts and pages editors in WordPress, you can schedule the product to publish at a specific date and time. Click the Schedule button to reveal the scheduling settings. Click on any of the date fields to select a date from the pop-up calendar that appears. You cannot schedule products to publish in the past through the pop-up calendar, but you can force past dates by typing in a specific date in the fields. Use the tab ⇥ button to quickly jump through each of the scheduling fields.
Click the Save Product button to save the product.