Ad blocking means that your browser does not send HTTP requests for items that match the profile of ads and tracking beacons. A website can detect this by creat

Ad blocking means that your browser does not send HTTP requests for items that match the profile of ads and tracking beacons. A website can detect this by creating a local asset linked to from the HTML that is never rendered, but which looks like an ad from the ad blocker's perspective. If a browser loads your page, but subsequently won't load that dummy asset, it is probably using an ad blocker.