The research focused on how investing in public infrastructure in South Africa can help boost the economy and reduce unemployment. Experts used special models to study the effects of this type of investment in the whole economy, not just in certain areas. By looking at data from 2015, they showed that increasing public infrastructure spending can make the economy grow, creating more jobs for formal workers. However, informal workers might not directly benefit, but they could indirectly benefit from the output of the construction sector. This suggests that investing in things like roads and buildings could be a good way to improve South Africa's economy and reduce poverty.