These are the direct object pronouns. They are used when we want to replace the noun. The direct object pronoun is placed before the verb in most cases and must agree with the noun in gender and number.

Examples

I need money – Necesito el dinero.  Lo necesito – I need it
You eat the bread – Comes el pan.  Lo comes – you eat it
I read the magazine – Leo la revista. La leo – I read it
We eat fruit – Comemos las frutas.  Las comemos