It's a common expression used to ask someone if they recall a particular event, person, or thing. It's similar to the English phrase "Do you remember?" or "Remember when...?"
For example:
* ¿Te acuerdas de la fiesta de cumpleaños de Juan? (Do you remember Juan's birthday party?)
* Te acuerdas de esa canción que nos gustaba tanto? (Do you remember that song we loved so much?)
It's important to note that "Te acuerdas" is in the informal "tú" form. You would use "Se acuerda" for the formal "usted" form.