Avere means to have, and it's the third verb you'll use every single day:

Pronoun	Avere	English
io	ho	I have
tu	hai	you have
lui / lei / Lei	ha	he, she has / you (formal) have
noi	abbiamo	we have
voi	avete	you (a group) have
loro	hanno	they have

The h is always silent: ho sounds exactly like o (or), ha like a (to), hanno like anno (year). The h is only there in writing, to tell the words apart.

• Marcos ha un cane. — Marcos has a dog.
• Abbiamo una casa a Firenze. — We have a house in Florence.