After creating a new product, you will see a warning at the top of the page that the product is not live on the web site because there are no versions live.

This makes clear if there are any reasons why the product being viewed is not visible from the front end of the web site. The reasons include:

• No valid live version
  
  
• Product is disabled ('show on site' checkbox unchecked)
  
  
• Product belongs to a customer group (in this case, the warning makes clear that the product is only visible to members of that group, and not the wider public)
  
  
• None of the parent categories are live

If you find for some reason that a product you created doesn't show up on the front end of the site, check it in the back end - this warning should provide clear guidance on the reason, and hence what steps you need to take to fix it.