MrBeast and his team build and give away 100 houses to families in need across various countries, including Jamaica, El Salvador, Argentina, Mexico, and Colombia. The video highlights the positive impact these new homes have on families living in unsafe conditions, often surprising them with fully furnished houses and additional gifts like a community soccer field, soccer equipment, Feastables, and even a motorcycle and bicycles for transportation. The initiative aims to provide safe and stable living environments for those who previously lacked them.