The following types of
resources are currently supported.
Defined by the IAB Tech Lab, ads.txt allows sites to specify which ad system accounts are authorised to sell their ad inventory.
An Apple specification that allows a site to define its relationship to Apple platform apps, e.g. allow links to a site to be opened in an app instead.
The Global Privacy Control is a signal user agents can send to sites, requesting that their personal information is not sold or shared with third parties. The gpc.json resource allows sites to indicate whether they respect the Global Privacy Control signal.
An informal standard that allows sites to ask web crawlers to not crawl certain urls.