Blanco Tequila is a 100% blue agave Tequila that is not aged and clear in color. You will also find it called silver, plata, or platinum Tequila. White Tequila (at least on this site) usually refers to an unaged mixto Tequila that is not made from 100% blue agave.
Blanco is the cleanest form of Tequila showing the agave fruit aromas and flavor more clearly than it's aged brothers reposado and anejo. A good blanco Tequila will show luscious, tropical, and sometimes pine aromas. More tropical fruit and agave character is found in the flavor profile sometimes with a bit of black pepper on the finish. Blanco Tequilas usually have a bit more heat than aged Tequilas but if it a quality blanco the heat will not be oppressive.
Though unaged, blancos may undergo settling for one or two months in stainless steel tanks. In some cases they can sit in neutral oak for a short amount of time, but this is an exception to the rule.
Because they are not aged, blanco Tequilas are the least expensive 100% blue agave Tequilas and can sometimes represent quite a value for a quality product. They are often used in Margaritas - at least more often than aged Tequila. But I have found great pleasure in sipping some blancos, especially El Tesoro de Don Felipe and Espolon. These are fresh, very approachable Tequilas that are perfectly enjoyable neat.
Do you have a favorite blanco?