A gragger, also is known as grogger or Raashan, is a noise maker used only on Purim. It is comprised of a handle and a revolving part that makes noise as you rotate it energetically. Noise making during services in the synagogue is forbidden the whole year, but on Purim adults & children make noise. During the Megilah reading, everytimes the Megilah reader mentions Haman name, making noise is like you eliminate evil. The custom is to make noise and the gragger is the traditional Purim noise maker. The message to all Amalek: the gragger is a reminder for us to eliminate the memory of Amalek totally. That we all should return to G-d with a whole and pure heart. In this manner, we will reach the joy of G-d’s divine protection and only then shall we live secure.
Blotting out Haman’s name occurs 54 times during reading, the congregation engages in noise making to blot out his name. This practice tradition can be traced back to the 13th century Rabbis the Tosafists based on a passage in the Midrash. The verse “Thou shalt blot out the remembrance of Amalek“ is the base of this custom . Another tradition was to write Haman on the soles of their shoes, as a sign of contempt. Another method was to use a noisy ratchet, called a Ra’ashan in Hebrew and in Yiddish a Groger.
In some Jewish communities there are rabbis protesting against this tradition, considering it as a disturbance of public worship. But the custom of using a Purim Grogger in synagogues on Purim is now universal. The Spanish and Portuguese Jews communities consider the use of Groggers breaches the serenity and respect of synagogues.