It will modernize it's agriculture industries, the backbone and founding stones of every modern state, and advance its economy and train its manpower. Another strong African ally in the future. There are also many other reasons for establishing ties and strengthening South Sudan, such as averting the crisis there to stop the flow of immigrants and allow those who wish to return, but are too scared scared, back, a future economic partner to boost Israel's economy, sign contracts with its oil industries, and more reasons, some political, some economic.
Doctors Without Borders leaves northern Afghan city of Kunduz after airstrike destroys hospital (AP)
from the article: Israel announces full diplomatic ties with South Sudan