BE USED TO = you are accustomed to something (it's normal for you). GET USED TO = you are becoming accustomed (the process of adapting). Both are followed by NOUN or -ING form (gerund).
Practice tip: Accustomed (state)? BE USED TO. Becoming accustomed (process)? GET USED TO. Both + noun or -ING. Different from USED TO (past habit)!