What does 'lo que' mean and how to use this word?
I have a question about what 'lo que' in spanish sentences means. I can see this word appearing pretty often but I'm not sure about the sense of meaning or how to use it grammatically. Anyone knows Spanish please explain me :D Gracias!

Question

Answer

Hi! 
Most of the times "lo que" can be translated as "what", usually in sentences with "what+(subject)"

"Sé lo que quiero"
(I know what I want)

Sonetimes "lo que" can be ommited:
"¿Qué es lo que dijo?"
"¿Qué dijo?"
(What did he/she say?)

But we also use "lo que" when "what" is ommited or not used in English:

"Everything they said was true."
"Todo lo que dijeron era verdad/cierto"

I hope it helps. ^_^