Well. `'lo' is a neutral particle, it doesn't mean anything, just like'would' in english. It help to address 'something' without naming it. Some examples: "Ese auto es caro" (That car is expensive) "Este auto es LO más caro" (This car is the most expensive thing) , but you already know we're talking about cars. "Eso puedo comprar" (I can buy that/those things) "Eso LO puedo comprar" ( I can buy 'that' thing) note that we aren't naming the thing "Esos LOS puedo comprar" (I can buy 'those') same as above, but in plural "LO mejor de Internet es que es gratis" (the best thing of Internet is it's free), here the word 'LO' could be 'feature', 'property', 'characteristic', 'advantage' of Inet, etc., but we mask all those alternative properties behind 'LO'.

Hi, "lo" es un articulo neutro. El artículo neutro singular sirve para sustantivar adjetivos: lo. Lo bello de la vida es..., Lo mejor está por venir, Lo feo está en que ..... Espero te sea útil mi respuesta. Saludos

There are (at least) two different kinds of "lo". The first one is that which works as masculine singular direct object pronoun, that is, it stands for a full direct object. In this case, it is equivalent to "it" in English: - Compro el coche -> LO compro // I buy the car -> I buy IT. - Me como el pescado -> Me LO como // I eat the fish -> I eat IT. If the substituted direct object is feminine, plural or feminine plural, the corresponding forms LA, LOS, LAS should be used instead: - Compro la casa -> LA compro // I buy the house -> I buy IT - Compro los coches -> LOS compro // I buy the cars -> I buy THEM - Compro las casas -> LAS compros // I buy the houses -> I buy THEM The second kind of lo is that which works as neuter pronoun. In this case, I think it is more close to the meaning of "that", "what" or "the" in English. This pronoun cannot appear by itself, but is rather used in a set of idiomatic expressions: * LO + adjective: In this case, LO refers everything which has a certain property: - LO rojo te sienta bien // THAT which is red (red garments, red accessories) suits you - LO natural es mas sano // THAT which is natural (natural food, natural lifestyle) is healthier * LO + relative clause: In this case, LO refers to a concrete entity or concept which has a certain property: - LO que me gusta es la lectura // WHAT I like is reading - LO que estoy esperando es el bus // WHAT I am waiting for is the bus * LO + comparison: In this case, LO refers to the entity which shows the highest intensity of a property overall: - LO más difícil es llegar // THE hardest THING is to reach there - LO más fácil es el principio // THE easiest THING is the beginning So I fear there is something which needs to be further explained in the sentence: - Este auto es LO más caro It doesn't matter if we were talking or not about cars, nothing is implyied here, this car is the most expensive thing, not the most expensive car. The only restriction is that is the most expensive thing among the things previously considered. If we wanted to say that this car is the most expensive one (so only among cars) the sentence would be: - Este auto es EL más caro But that is a completely different story, and it should be told in another time :) Bye!

Lo = "it" in most of the ways