Let’s say you need to get rid of budget quickly, you have a repeat buy or you just want to see what is available in the market, your best option will be the marketplace. The marketplace is a great way to discover inventory for your campaign based on category, country, site or publisher. Not only that, you can drill down even further by applying additional filters such as audience targeting (1st party buyer or publisher data or 3rd party) and product filtering by device, ad format, buy type, ad size or classification.
Once you have your search results simply click on the product tile to reveal more information about what is included. This will provide you breakdown information on the product such as targeting options and attributes such as devices, classification and ad sizes.
Depending on which stage you are at with your campaign you will have the option of either adding this product to your planner or media schedule - just click on the option that applies to you.