Q. In shul do the rabbi or the gabay have to explain the meaning and translation of Parshas Zachor before the reading, so the attendants who don’t know the Hebrew will understand?

A. Although it is best to know the translation of the words, it is not essential. And we do not have a tradition to explain them before the reading. (Nitey Gavriel – Purim 19: 8.)
Horav Shlomo Miller’s Shlit’a opinion is similar

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit”a.