Seva means ‘service’ or ‘to give’ and is one of the founding principles of Sikhism. When you go to any one of the many beautiful Gurdwaras (Sikh temple of worship) around the world, the common denominator that you see are volunteers who give their time to provide free food for everyone. The people who make and serve all of this wonderful food and all of those who then clean the countless plates, pots and pans afterwards, all do so in the name of Waheguru (God).
It is their way of giving service or something back to society. It is their ‘seva’.
Selfless service i.e. giving without wishing to receive is one of the most beautiful acts that a human can achieve. However what you actually receive in terms of a joy and spiritual enlightenment by helping others cannot be overstated.