Google.es, the version of Google customized for Spain is No. 1 on the list, and Google Mexico is No. 2. And Google.com comes in third; if your browser is set with Spanish as the preferred language, it shows up in Spanish rather than the default English. Three other regional versions of Google are in the top 25.
So after Spanish-speaking Internet users find what they're looking for, where do they go? The top nonsearch site is the Mexican version MercadoLibre, a site very much like eBay except that most of the items are sold at fixed prices rather than through auctions. (MercadoLibre also serves most other Latin American countries, including Brazil.)
Next on the list is Softonic, a site for downloading software.
Other top sites include Marca (sports, based in Madrid), Sonico (promoting family and friend connections, based in Buenos Aires and Mexico City), El Mundo (Spanish and international news, from Madrid) and Sexy o no? (dating; the site is tamer than the name suggests).