a sangha is a "fellowship/group of buddhists"
So, if you are buddhist, your sangha would be the group that you
sit/meditate with or receive teachings with.
It means a lot to them, because while being in a Sangha, you help
people and share stuff. And that is the right way to reach Nirvana.
And also to share is a good Karma which also makes them closer to
Nirvana. Also, being so busy, they don't become selfish. So as you
see, it is very related.
Hope this helps. I am a just a 7th grader who is learning
Buddhism. So this might not be correct, but this is what I think.
You must have heard " Buddham
saranam , SANGHAM
saranam and Dhammam
Saranam)- Here, it is very clear that
Sangha refers to the community of monks. They are already convinced
by the Buddha's philosophy to an inestimable extend, and not only
they practice the Eight fold paths, but also strive for swallowing
the TEN virtues. Therefore, in terms of commitment there is no
comparison between monks ( SANGHA) and a laymen Buddhism follower.
Here, it is important to understand that the Buddha, Sangha and the
Dhamma(teachings) are the ultimate vehicle for a person to progress
in Buddhism. I wish, my help was useful....Nothingness.