The verb tener means to have. And when you conjugate it the endings change based on if you are speaking about your self, directly to someone else, or about someone.
Tengo- I have (Example: Tengo un perro - I have a dog)
Tienes- You (informal) have (Example: Tienes un perro- You have a dog)
Tiene- you (formal)/he/she has (Example: Usted tiene un perro- You have a dog Ella/Ello Tiene un perro- She/He has a dog)
Hope that makes sense and helps :)