The Greek alphabet originally derived from that of the Phoenicians. The Greeks added the vowels and passed the alphabet to Rome where it became the basis for English, French, Spanish, Italian, German, Romanian and so forth. Many people believe that the Russian alphabet is similar to the Greek one, but this is inaccurate as the Greek alphabet was adapted by the missionaries Cyrille and Methodius to create the new Russian alphabet.
Learning to read, write and pronounce the Greek alphabet is crucial. You will be able to write your name, read menus and signs in the street, correctly pronounce all the names you will hear while you visit the country and of course, you will be able to learn the language itself!