Google introduces new meta tag unavailable_after

Google has released a new tag “unavailable_after”, which will prevent Google from indexing the page after a certain date. This can come in handy if you have a proposal on the site that is valid for a limited period of time, or other data that is free to distribute for only some time, which after it becomes paid. Then you can use the unavailable_after tag in order for Google to stop entering these data into the database and display them in the search results.