Bidscape.it Header Bidding Ad Inspector is a display advertising inspection tool. It integrates with Google Ad Manager's googletag, Prebid.org's header bidding pbjs, and Amazon AUM's header bidding apstag in order to help adops professionals with ad setup and debugging.

You can see detailed targeting parameters, all the bids from amazon and prebid auctions, winners, rendered ads, and viewability percentages to make sure that the correct ads are rendering on each of your pages and that that viewability stays high. Supports refreshing ads and infinite scroll.

As a regular user you can use the tool to see how much advertising revenue you're generating for each page that you visit while browsing the web. This amount will be reported in CPM, the amount a website would get paid for 1000 of impressions like yours.

Unfortunately, the CPM amount is a lower estimate based on the header bidding data avilable from prebid and it's not always possible to get the exact amount due to a lack of transparency on all ad delivery platforms. So you will usually see a much lower value than what websites will actually make. It is a decent lower bound.

Tool will automatically appear when it detects that ads are displaying on the page being browsed and show up in the top right corner of the page window.

You can disable it completely by clicking on teh Bidscape.it icon in the extensions menu bar in your browser.