Friday Prayer is very important in Islam. It has got its own moral, social and political benefits. It is obligatory for every Muslim expect women, children, seriously ill people and travelers. They can pray Jumah but it is not obligatory on them.
Prophet Muhammad (saw) has given a strong warning to a person who leaves his Jumah prayer without a good reason. In one hadith Abdullah Bin Masud (ra) narrates what the Messenger of Allah (saw) once said about the people who did not come to the Friday Prayer without a good reason.
"I wish to appoint someone to lead the prayer and myself go to the house of those who missed the Friday Prayer and set fire to their houses with the occupants in them." (Muslim, Ahmad)
Another hadith states, "A person who leaves 3 Friday Prayers consecutively, Allah puts a seal on his heart." (Ahmad, Tirmizi, Abu Dawud)