A placeholder page is like a temporary empty web page that is used to hold a spot and tell the viewer that the actual content is not yet available or under construction. Full definition
We have seen many European retailers posting placeholder pages for a new Light FX version of Kylo Ren from Star Wars: The Force Awakens in the past couple of months, -LSB-...] (diskingdom.com)
You will soon find that many others in Placeholder page The owner of this web site has not put up any web pages yet. (myintimcity.com)
You can check out the official placeholder page here. (nintendowire.com)