An online advertising network or ad network is a company that connects advertisers to web sites that want to host advertisements. The key function of an ad network is aggregation of ad space supply from publishers and matching it with advertiser demand. Also read about the different types of ad networks here
A big question for me and the industry is whether exchanges are better than ad networks. What do you think? Let me start by comparing the two from the advertiser perspective. I am focusing only on brand advertisers, and ad networks that sell high CPM brand advertising on good quality, brand-safe sites.