I remember watching this movie a couple of times and there are always scenes that impress me. As @marcybetancourt said, the most memorable scene of the Battleship Potemkin is the scene of the Odessa staircase where the army charges against the people and we see the massacre of the citizens. But certainly this scene never really happened and was a complete invention of Eisenstein, However, the influence of the film has been so great that many people have claimed that the massacre of the staircase really existed. Eisenstein
is remembered for the great advances he made in editing (there are even some who qualify him as the best) and The Battleship Potemkin as one of the best films in history. Excellent series, @josemalavem