Reflexive pronouns are used in the verbs conjugations when the person who performs the action and the person who undergoes the action is the same. Therefore, the verb form becomes reflexive:

alzare (basic form) → alzarsi (reflexive form)

For example:

Io alzo la mano → I raise the hand (I = subject that performs the action / the hand = object that undergoes the action → they’re different, therefore the form isn’t reflexive)

Io mi alzo dal divano → I stand up from the sofa (I = subject that performs the action / myself = object that undergoes the action → they‘re the same, therefore the form is reflexive and we use the reflexive pronoun before the verb, agreed with the subject)

incontrare (basic form) → incontrarsi (reflexive form)

Fo