Inside AdSense: The forecast is clear in Google Ad Manager

If you're a publisher who sells advertising space directly to advertisers, you might have experienced times when you've been unsure about how much inventory is available for you to sell. Google Ad Manager can help you learn what you have available to sell by forecasting your future inventory and subtracting off what you've already sold.

A Helpful Analogy

To put this into context, pretend for a minute that instead of a website, you run a popular destination hotel. Instead of selling space to advertisers, your job is to book hotel stays for guests. You receive all kinds of requests to book hotel rooms: two rooms for a one-week family vacation, 100 rooms for a three-day conference, a suite for a weekend getaway. In order to book these reservations, you have to know both how many rooms your hotel has and how many rooms are already booked. For a hotel, this is fairly straightforward. You know exactly how many total rooms the hotel has, and you can subtract how many rooms are booked for each night.

For a publisher, it's not as straightforward. Since the amount of inventory you have to sell is directly tied to your site's traffic, it can vary day by day. It's also complicated because there's flexibility in how you meet your obligations. If an advertiser has booked advertising space on your Finance and Entertainment sections, for example, you can serve more ads on the Finance page and fewer on the Entertainment page. To compare to a hotel, it's like you have the flexibility to substitute two single rooms for one double room. Because of the variability of traffic and the flexibility in how you can satisfy your reservations, it's hard to kno


Inside AdSense: The forecast is clear in Google Ad Manager