To avoid repeating a noun, French swaps it for a pronoun — and, unlike English, puts the pronoun before the verb. I see it comes out as I it see: Je le vois.

These are direct object pronouns: they replace the person or thing the verb acts on directly, with no little word like à in between.

Full noun	With a pronoun
Je regarde le film.	Je le regarde. — I'm watching it.
Je cherche la clé.	Je la cherche. — I'm looking for it.
Tu manges les croissants ?	Tu les manges ? — Are you eating them?
Il aime Marina.	Il **l'**aime. — He loves her.

• le for a masculine noun, la for a feminine one, les for any plural.
• Before a vowel or silent h, le and la shrink to l': je l'aime.
• The gender comes from the French noun, not from English it: la clé → la, le portefeuille → le. And le can mean him as well as it.