Should Moody's credit rating downgrades worry the average Motswana?

It should be noted that the rating had been adjusted in May 2020 from A2 with a stable outlook to A2 with a negative outlook, essentially forecasting the current downgrade. Previously, Botswana had been rated as A2 and stable since November 2011 but has been on A2 since 2001. The question, therefore, is what does this all mean? Is it significant? How will it affect us as Botswana and should we be worried?

Firstly, what is a credit rating and what does it try to tell us?