Qurbani is the religious practice of sacrificing an animal in the way of Allah (swt), whose meat is then distributed to those in need, providing protein that is usually missing from their diets.
On a spiritual level, this act symbolises a human beings willingness to give up or detach from those barriers (such as wealth, pride, arrogance) which weaken our faith and hold us back from seeking closeness to Allah (swt). It is a time for people to reflect on what changes we need to make within ourselves to become better human beings.
‘(if you wonder why Allah Needs your Qurbani’s flesh/blood?) It is not their flesh or their blood that reaches Allah. Rather, it is your God-wariness (sacrificial spirit to revere & obey him) that reaches Him (& raises you close to Him)…’ (Surah Al-Hajj, 22:37)