The verb forms in informal greetings belong to the pronouns tú or vos. These pronouns are used with family and friends.
Tú and vos have the same meaning, “you”. Tú is mostly used in Mexico and Venezuela. Vos is very common in Central America and Argentina.
However, no matter which of these two pronouns you choose to use, Spanish speakers will for sure understand you.
The following informal greetings belong to both tú and vos.