What is the word "lo" used for?
When and how is it used?
Thx qfreed. that covers everything.
I'd just try to put it in a different way.
'lo' is usually equivalent of 'it'(english)
Example: Ver (to see) + lo (it) => verlo => Quiero (I want) verlo (to see it)
One more usage: when 'What' is at the beginning of a question: What do you want? then What = que. But if it's in the middle of a Regular sentence, it's 'lo que'
There's a third usage that qfreed has mentioned. but I haven't learnt that far yet.
This link may help.
It can be an accusative (direct object) pronoun referring to masculine objects or persons.
It can be part of a neuter, relative pronoun...lo que. (which, that which, what, etc.)
It can be the neuter definite article used with adjectives serving as nouns. (e.g. lo bueno, lo mismo)