The Publisher Console has two main tabs that display page information: "Ad Slots" and "Page Request", as well as a settings page under the Settings icon 
Ad Slots tab
The Ad Slots tab displays the following information:
- Publisher's Ad Manager ID
- Creative size
- Time to fetch and render this ad
- Links to helpful debugging information
There are three links within the "Ad Slots" tab that help you find the most important information quickly:
- Open Ad Unit in Ad Manager: Opens the ad unit in their Ad Manager network.
- Delivery Diagnostics: Opens a new window with information (for desktop, mobile web, app, or video) about which line item is serving and the other line items eligible to serve to that ad slot. This is useful for understanding why a line item did or did not serve to this slot.
- Open Creative in New Window: Run the ad request again for that ad slot. The result is shown in a new window but might be a different creative.
To use the "Open Ad Unit in Ad Manager" and "Delivery Diagnostics" links, you must be logged into an Ad Manager network. Although the use of the Google Publisher Console is not restricted to the site owner, private network information through these links are not accessible to the public.
Page Request tab
The Page Request tab can help troubleshoot why a page is loading slowly by showing the sequence of events that occurs during a page load. It displays the following:
- Tag checker, which shows a green checkmark with the message "Page tagged correctly!" if there are no tagging errors.
- Time to fetch and render ads
- HTTP user agent information
- Timeline of events in rendering ads, like the sequential view in a web proxy tool console
From the Page Request tab, you can also reload the page by selecting one of the following options from the "Reload Page" drop-down:
- Normally: Requests and renders ads.
- Without ads: Does not request or render ads.
- Without rendering ads: Requests but does not render ads.
An ad request URL has a character limit, depending on the tag type. If the character count for your ad request exceeds the limit and gets truncated, the console will display an error: "Ad unit failed to fetch." Learn more about character limits.
