Answer:
Advantages: If your community was growing you'll have more people in it and your community will be more productive. Farming, Trades, Money, that helps a community out a lot. Also, jobs, having jobs like blacksmiths or farmers help economically
Disadvantages: The Increasing of the global human population is also depleting natural resources like water, food, and land.
(This is someone else's answer, saw it yesterday and it worked for me!