What is the biggest problem of real GDP with its interpretation and why?

The biggest problem with real GDP is that it does not account for the distribution of income among residents of a country, which can mask inequalities and differences in well-being. Additionally, real GDP overlooks non-market transactions and the value of informal economies, leading to an incomplete picture of economic health. It also fails to consider environmental degradation and resource depletion, which can undermine long-term sustainability despite showing growth. Thus, while real GDP is a useful economic indicator, it can be misleading if used in isolation for assessing overall societal progress.