Maror is the bitter herbs (horse radish). We eat them to remind us of the bitter times the Jews had in Egypt.
Now please place some maror on a piece of matzah and recite the following prayer:
Baruch Ata Ado-nai Elo-heinu Melech Haolam Asher Ki-d’shanu Be-mitzvotav Vetzivanu al Achilat Maror.
Blessed are You, Lord our G-d, King of the universe, Who has sanctified us with His commandments, and commanded us concerning the eating of Maror.