If you are looking for reach in Spain, you probably will need to advertise on these websites. Here are the top 100 websites (with programmatic advertising) in terms of unique users.
In PPC Land we are looking to publish the top 100 websites of each country in 2017. This was just the first. Follow the tag Top100Websites.
|Platform||Formats||Bidding Types||External Demand||Payment terms|
|Adsense||Display, Native, Search, Games, Video, YouTube.||CPM, vCPM, CPC, CPE.||Yes, connected via Google Ad Manager.||+21 days (Monthly)|